IAYF

IAYF means "it's all your fault." Friends might include this acronym in a text message as a joke or, more rarely, when they're actually mad at each other. Online gamers, on the other hand, use IAYF to troll other players, especially teammates they feel have cost them a game.

If you feel the urge to seriously tell someone IAYF, maybe slow down and take a deep breath first. The person likely already knows they screwed up, and there might be no need to pile on and make them feel worse.