IYKYK
initialism
An internet wink meaning “if you know, you know”: the right people already have the context.
Also known as if you know, you know
IYKYK means ‘if you know, you know’. It is the internet’s tiny raised eyebrow: a reference offered without the full explanation because the right people already have the context. In the book it follows a joke about Richard Starkey not being Ringo Starr. Some readers catch it immediately; others carry on with their lives, which is also allowed. It belongs here because shared context is not decorative fluff around communication, it is communication. The odd family line, the local joke, the exact song somebody played in 1997 while packing a suitcase tell us a particular person is speaking to particular people, not spraying pleasant beige over everybody. A model can expand IYKYK into its four words. The human work is knowing when explanation would kill the thing.
See also AI slop Model collapse