If You Know You Know
If you know you know, abbreviated as iykyk is a slang expression, most prevalent on social media posts, among teens, girls and on teenage girls’ social media posts.
The phrase itself refers to the fact that some information is exclusively known and understood by some and it cannot be explained to others.
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It is unclear where the expression comes from, however the earliest online mention of “if you know you know” appeared on Urban Dictionary, when the phrase was first defined in 2015.
Iykyk was further popularized in 2018, by the hit of PUSHA T, titled If You Know You Know.
Spread and Usage
Following the 2018 rap hit, the expression would frequently appear in tweets, as well as Instagram, Facebook and Reddit posts.