F BOMB Share definition Flag The F BOMB is another term used to describe a fart. F BOMB a shortened version of Fart BOMB and it is used as a slang definition. Oh, gross! Lea-anna dropped the F BOMB last week and she didn't say anything! F BOMB by Bec ♥ August 19, 2008 0 0 Get merch Get the F BOMB mug. Buy Now — $32.95 See more merch