NGASF Share definition Flag NGASF is the acronym for the phrase:1) Not Giving A Single Fuck Joe: "Hey Bill, can I ask out Suzy?" Bill: "I'm NGASF." NGASF by CharlieTheDrunkGuineaPig March 30, 2011 0 0 Get merch Get the NGASF mug. Buy Now — $32.95 See more merch