Short for "I don't give a fucking shit", is rarely used but used when you're angry as fuk, or has massive boredom because of people constantly bugging you gossiping about a person or just doesn't care about a person's opinion on something.
Mary: Did you know that James slapped a girl in the face because of a argument about games causing violence?
Joey: Mary, IDGAFS about that.
Joey: Mary, IDGAFS about that.
by TerrariaGamer June 21, 2020