Definition

Acronym for 'if you know you know,' used to reference inside jokes or experiences that only certain people will understand. The digital equivalent of a secret handshake that excludes everyone not in the know.

Example Usage

That restaurant bathroom code situation... iykyk.

Origin

Hip-hop and internet culture abbreviation that became mainstream through social media around 2018-2019

Fun Fact

The phrase simultaneously creates community among those who get it while being annoying to everyone else, which is arguably the point.

Source: Hip-hop culture and social media