YKW

An internet and text messaging abbreviation standing for 'you know who' or occasionally 'you know what,' used to refer obliquely to a person or thing without naming them directly. Often deployed to signal an inside reference between people who share context — the person being discussed doesn't need to be named because the recipient already knows. Can have a conspiratorial, teasing, or gossip-forward tone. Common on social media, group chats, and messaging apps.

An internet slang and text messaging abbreviation with two common readings: You Know Who (used to reference someone without naming them, often in gossip or secret-keeping) or You Know What (used to introduce a statement obliquely). The ambiguity is usually resolved by context. Primarily used in informal digital communication among people with shared reference points. The deliberate vagueness of YKW is sometimes its entire purpose — saying ykw without specifying invites the listener to fill in the blank themselves.

(internet slang, text messaging) Or you know why.