IYKYK
Stable🌍UniversalDefinition
If You Know You Know. Used when referencing something that only certain people will understand. Creates an in-group feeling — either you get it or you don't.
Translation for Parents
It means 'if you understand this reference, you're part of the cool group.' It's the internet version of an inside joke caption. If your kid posts 'IYKYK' and you don't know... that's kind of the point. You're not supposed to know. Yet here you are, reading this. Determined.
Examples
“Room 304 at 3rd lunch IYKYK”
“Something happened in room 304 during lunch that only insiders would understand”
“That song at the end IYKYK 😭”
“The song at the end had special significance that only certain people would understand”
Cringe Score
Mildly embarrassing
Using IYKYK in a Facebook post about your neighborhood will get you exactly the response you want: confused outsiders and knowing insiders. It works everywhere.
Category
filler
Peak
2021-01
Last Verified
2026-02-25
Sources
urban_dictionary, reddit