idgasf Share definition Flag Acronym for "I don't give a single fuck". A variant of idgaf and idgf, for when the amount of fucks you give are so few that you don't give not even a single one. Kathy: Clay Aiken's on tour again! Matt: idgasf idgasf by Lithane March 27, 2011 0 0 Get merch Get the idgasf mug. Buy Now — $32.95 See more merch