What Does ‘IYKYK’ Mean?
IYKYK stands for "if you know, you know" and hints at an inside joke or reference only some people will get.
Internet & memes abbreviation
Examples of ‘IYKYK’ in a sentence
- “Wore my lucky socks today. IYKYK.”
- “That old dance move... iykyk.”
Where does ‘IYKYK’ come from?
It spread on social media in the 2010s, and Dictionary.com lists it. The first user is unclear.
How to use it, and when not to
Use it for inside jokes. If you are the one outside, just ask.
For parents and teachers
Fine around parents and teachers. Safe.
Related slang
Frequently asked questions
What does IYKYK mean?
IYKYK stands for "if you know, you know" and hints at an inside joke or reference only some people will get.
Where does IYKYK come from?
It spread on social media in the 2010s, and Dictionary.com lists it. The first user is unclear.
Is IYKYK OK to say around parents or teachers?
Fine around parents and teachers. Safe.
How do you use IYKYK in a sentence?
Wore my lucky socks today. IYKYK. That old dance move... iykyk.
More internet & memes slang
67, Aura farming, Bet, Brainrot, Cap, Chronically online. Or browse the full A–Z / try the Slang Translator.
Sources
Definition written by VibeDex. Slang changes quickly, so this is a snapshot. Last reviewed 2026-10-23.