You know English grammar. You know a few thousand words. But internet slang words and meanings are their own thing, and no class ever taught you them. Then you open a comment section, or a group chat, and someone writes “ngl this show is giving mixed signals, no cap” and you understand every single word… except the sentence makes no sense.

That’s because none of these words live in a dictionary. They live in captions, comments, and texts, and they can change what a sentence means without changing its grammar at all.

Here are 10 internet slang words and meanings you’ll actually run into, from captions to comment threads, each one explained in plain English with a note on tone and where you’ll hear it.

The One Rule First: Keep It Out of Emails

Before the list, one warning. Every word here is casual, spoken-style English. It’s fine in a text to a friend, a comment under a video, or a group chat. It is not fine in an email to your professor, a cover letter, or a message to your manager.

Mixing these into formal writing is the fastest way to send the wrong signal. Save them for casual, spoken contexts only.

10 Internet Slang Words and Meanings You’ll Actually Hear

1. No cap

• Meaning: “I’m not lying” or “seriously.”
• Tone: casual, drops at the start or end of a sentence to back up a claim.
• Where you’ll see it: video captions, comment sections, texting.

Example: “This coffee shop has the best pastries, no cap.”

2. It’s giving [x]

• Meaning: “it has the energy of ___.” You fill the blank with almost anything: a mood, a person, a vibe.
• Tone: casual, describes a feeling rather than a fact.
• Where you’ll see it: fashion and reaction videos, memes, comments under photos.

Example: “That outfit is giving main character.”

3. Low-key / high-key

• Meaning: low-key means “kind of, but I don’t want to make a big deal of it.” High-key means the opposite: “very much, no hiding it.”
• Tone: casual, softens or boosts an opinion.
• Where you’ll see it: texting, comments, captions.

Example: “I low-key love this song.” / “I high-key need a nap.”

4. Deadass

• Meaning: “seriously, I’m not joking,” a stronger cousin of “no cap.”
• Tone: casual, often mid-sentence.
• Where you’ll see it: texting, voice messages, comment replies.

Example: “I deadass forgot we had a test today.”

5. Rizz

• Meaning: charisma, especially the kind that helps you attract someone. Short for “charisma.”
• Tone: casual, often used as a noun (“he has rizz”) or a rating (“that’s mid rizz”).
• Where you’ll see it: short-form video, group chats, dating-adjacent memes.

Example: “He walked up and just started talking, the rizz was unreal.”

6. Based

• Meaning: someone stating an opinion confidently, without caring if it’s popular. It is not “correct,” just unapologetically themselves.
• Tone: casual, a compliment for confidence, not necessarily agreement.
• Where you’ll see it: comment sections, forums, memes.

Example: “He said pineapple belongs on pizza and didn’t back down. Based.”

7. The ick

• Meaning: a sudden, often small thing someone does that kills your attraction to them, instantly.
• Tone: casual, usually paired with “get” or “give.”
• Where you’ll see it: dating story videos, comment sections, memes.

Example: “He chewed with his mouth open and I got the ick.”

8. Hits different

• Meaning: something feels more powerful, nostalgic, or emotional than usual, in this specific moment.
• Tone: casual, follows the thing it’s describing.
• Where you’ll see it: captions under music, throwback photos, food posts.

Example: “Coffee on a rainy day just hits different.”

9. Main character energy

• Meaning: acting like the center of your own story, in a confident, good way.
• Tone: casual, almost always a compliment.
• Where you’ll see it: captions, comment sections, video trends.

Example: “She walked into that interview like she had main character energy.”

10. Say less

• Meaning: “I understand, you don’t need to explain further,” or “consider it done.”
• Tone: casual, often a standalone reply.
• Where you’ll see it: texting, comment replies.

Example: “Wanna get pizza tonight?” “Say less.”

Why Internet Slang Words and Meanings Aren’t In Your Textbook

Textbooks move slowly. This kind of slang moves fast, changes tone by the month, and lives almost entirely in speech and captions, not print. By the time a word makes it into a course book, it’s usually already out of date.

That’s exactly the gap Subturtle is built for. When you hit a phrase like this while watching a video or scrolling a comment thread, you save it on the spot, with the context still attached, instead of losing it the second the clip ends. It works well next to a list built the other way round, from phrases instead of single words.

Comment sections don’t wait for anyone. A good outside source, like Merriam-Webster’s own slang watch list, shows how fast this kind of vocabulary actually turns over.

How to Actually Learn These Without Sounding Try-Hard

Don’t force these into your own speech the day you learn them. Notice them first. Watch how often native speakers actually use each one, and in what tone. “No cap” said constantly can sound different from “no cap” dropped once at the right moment.

Save the ones you hear often, with the sentence they came from. The AI Coach in your dashboard brings your saved phrases back on a schedule, so you get a feel for the tone before you ever try one out loud.

Watch a few more clips, listen for these 10 words, and you’ll start hearing them everywhere.

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