IYKYK definition : 1. written abbreviation for if you know you know: used, for example on social media and in text…. Learn more. Discover iykyk meaning and how it became a trendy phrase among social media users. Join the conversation now! Iykyk is an abbreviation of the phrase if you know, you know, used to indicate an inside joke or a reference to something only a select group of people know and understand. Learn more about its usage, origin, and examples on Dictionary.com. IYKYK stands for “ If you know, you know .” It’s used on social media posts and in texts to indicate that the poster or texter is talking to a certain audience, and that only that audience will understand the reference they’re making.
