Learning English can be challenging, especially when you realize that what you learned in class isn’t always what people say in real life. That’s where slang words come in.
Whether you’re making friends, watching TV, or scrolling on social media, slang is everywhere. In this guide, you’ll learn what slang words are, why they matter, and which expressions you need to know to sound more like a native speaker.
Let’s dive in!
What Does the Word Slang Mean?
Slang refers to informal words and phrases that are often used in spoken language. These words are usually specific to a group, culture, or generation.
You won’t usually find slang in textbooks, but you’ll definitely hear it in conversations, music, and movies.
Why Slang Words Are Important for ESL Students
You might be asking, why should I learn words that are slang if they aren’t “correct” English?
Because slang helps you:
Understand real conversations
Slang is everywhere; in music, movies, YouTube videos, and daily conversations. If you don’t know common slang, you might understand the words but miss the meaning.
Learning slang helps you follow jokes, cultural references, and casual remarks that native speakers use all the time.
Connect with people socially
Whether you’re chatting with classmates, joining a club, or just hanging out, using slang can help you feel like part of the group.
It shows that you’re familiar with local expressions and that you’re open to engaging in natural, friendly conversations. It builds social confidence and helps you make connections faster.
Sounds more natural and confident
Even if your grammar is perfect, speaking too formally can make you sound distant.
Adding a few slang words (in the right context) can make you sound more relaxed, confident, and fluent. It shows that you understand not just the language, but also the culture.
Ignoring slang could leave you feeling lost; even if your grammar is perfect.
How to Learn Slang Words the Smart Way
Here’s the good news: you don’t need to learn every slang word out there. You just need to focus on the most common and useful ones.
Here are some tips to make your learning easier:
Listen and observe
One of the easiest and most effective ways to learn slang is by exposing yourself to real English. Watch popular TV shows, follow English-speaking YouTubers and TikTok creators, or listen to music in English.
As you listen, pay close attention to how words are used in context, especially expressions you don’t recognize. This helps you get used to the tone, attitude, and timing of slang without needing a dictionary.
Ask native speakers
When you’re unsure about a phrase, just ask! If you’re studying at Language Systems, your classmates and teachers are great resources.
Native speakers can explain meanings and tell you when and how a slang word is used—or when it’s better to avoid it. This not only helps you learn faster but also builds your confidence in using English naturally.
Use slang with caution
Slang is fun, but not always appropriate. Some expressions can be offensive, outdated, or too casual for certain settings like school, work, or formal emails.
That’s why it’s important to understand both the meaning and the tone of each word before using it. When in doubt, listen more than you speak. Use slang only when you’re sure it fits the situation.
Keep a slang journal
Don’t trust your memory alone; write it down! Create a small notebook or digital note where you keep track of the slang words you hear. Include their definitions, example sentences, and where you heard them (like in a song or show).
Reviewing this slang journal regularly helps you remember and use new phrases more confidently in conversation.
What Does the Slang Word asl Mean?
If you’ve seen asl in a message or post and thought it meant American Sign Language, you’re not wrong. But in slang, it means something else entirely.
In online slang, asl is short for “as hell”, used to emphasize something:
“I’m tired asl” = I’m very tired.
So always consider the context!
20 Slang Words ESL Students Should Know
Now that you know why slang matters, let’s explore 20 expressions you’ll hear from native speakers. These are popular in the U.S. in 2025 and are great for casual conversations.
1. Ghost
To ghost someone means to suddenly cut off all communication without explanation; no texts, no calls, no responses. It’s commonly used in dating but can apply to any relationship or situation.
“He ghosted me after the first date.”
2. Salty
Being salty means you’re bitter or irritated, usually about something minor or petty. It’s used to describe someone who can’t let go of a small loss or insult.
“She’s salty because she lost the game.”
3. Flex
To flex means to show off, usually in a way that’s meant to impress others. It can be about wealth, style, talent, or even achievements.
“He’s always flexing his new sneakers.”
4. Cap / No cap
Cap means a lie. When someone says “no cap,” they mean they’re being completely honest. It’s a fast way to call someone out or confirm sincerity.
“That’s cap, you didn’t meet Beyoncé!”
“I’m serious, no cap.”
5. Vibe
A vibe is the feeling, energy, or atmosphere of a person or place. You can say someone “has a chill vibe” or a place gives off “good vibes.”
“This café has good vibes.”
6. Lit
When something is lit, it’s exciting, fun, or high-energy. It’s most often used to describe parties or events that are lively and memorable.
“That concert was lit!”
7. Lowkey / Highkey
Lowkey means “a little” or “secretly.” Highkey is the opposite; it means openly or strongly. Both are used to express levels of emotion or desire.
“I lowkey want to skip class.”
“I highkey love this song.”
8. Sus
Short for “suspicious,” sus describes something or someone that seems untrustworthy or shady. It became popular from online gaming but is now common in everyday conversation.
“That deal sounds sus.”
9. Slay
To slay means to do something extremely well, with skill and confidence; especially when performing or looking stylish.
“You slayed that presentation!”
10. Bussin’
Bussin’ is used to describe food that tastes amazing. It’s a fun and expressive way to show you’re enjoying your meal.
“This pizza is bussin’.”
11. Simp
A simp is someone who goes overboard with affection or admiration; often for someone who doesn’t return the same energy. It can be playful or critical, depending on the context.
“He’s simping hard for her.”
12. Bet
Used to show agreement or approval, bet means “okay” or “sure.” It’s a casual and confident way to accept a plan.
“Wanna go out?”
“Bet!”
13. Mood
Mood is used when something perfectly matches how you’re feeling. It can describe emotions, behaviors, or even funny memes.
“That sleepy cat is a whole mood.”
14. Tea / Spill the tea
Tea means gossip or drama. If someone says “spill the tea,” they’re asking for the juicy details about something interesting or scandalous.
“Come on, spill the tea!”
15. Shade
Throwing shade is making a subtle insult or criticism, often clever or passive-aggressive. It’s about disrespect, but done with style.
“She threw shade during the meeting.”
16. Woke
Someone who is woke is aware of social and political issues like racism, inequality, or climate change. It shows consciousness, but can also be used sarcastically.
“She’s woke about climate issues.”
17. GOAT
An acronym for “Greatest of All Time,” GOAT is used to praise someone at the top of their game; athletes, artists, or anyone outstanding.
“LeBron is the GOAT.”
18. Clap back
To clap back is to respond to criticism with a clever, strong reply. It’s about defending yourself with confidence.
“She clapped back at the rude comment.”
19. Yeet
Yeet is a fun word that means to throw something forcefully or with enthusiasm. It’s often used playfully or dramatically.
“He yeeted the ball across the field.”
20. Hits different
When something hits different, it affects you more deeply or emotionally than usual. It’s often used to describe songs, memories, or moments.
“This song hits different at night.”
Words That Are Slang: What to Avoid
Not all slang words are safe to use everywhere. Some are outdated, too regional, or even offensive.
Here are a few tips:
Avoid slang in formal writing or job interviews
Slang is perfect for casual conversations, but it has no place in professional or academic settings. Using expressions like “lit” or “no cap” during a job interview or in a college application essay can sound unprofessional or even confusing.
Stick to formal language when writing emails to teachers, applying for jobs, or giving presentations. Save slang for friends, not hiring managers.
Skip words you don’t fully understand
It might be tempting to use a trendy word just because you’ve heard others say it; but using slang incorrectly can lead to awkward or funny situations.
Before using a slang word, make sure you understand its true meaning, tone, and when it’s appropriate. Some slang expressions can have multiple meanings or be considered rude in certain contexts.
Ask if a word is still “in.” Slang trends change quickly!
Slang evolves fast; what’s cool today might sound old-fashioned tomorrow. If you’re not sure whether a slang term is still used, ask a native speaker or younger friend.
Using outdated expressions like “groovy” or “rad” can make your English sound like it’s from another era. Staying current helps your speech sound natural and fresh.
When in doubt, stick to slang that you’ve heard frequently in current conversations, especially with young adults.
Learn Slang Naturally with Language Systems
If you’re wondering how to practice slang in a fun and effective way, the answer is immersion.
At Language Systems, you’ll learn English with real-life communication in mind; not just grammar books. Our classes encourage conversation, social interaction, and the confidence to use slang words appropriately.
Whether you’re planning to study at a U.S. university, travel, or simply fit in socially, knowing slang is key to speaking like a native.
Slang Words Are the Key to Real English
Mastering English means going beyond grammar rules and textbooks. Slang words give you access to the way people really speak; and that can change your entire experience in an English-speaking country.
So start paying attention, practice what you learn, and don’t be afraid to sound natural.Want to take your English to the next level? Explore our conversation program and get started today with Language Systems!