Two Fannies Share definition Flag Two Fannies is a condition some really fat girls suffer when they wear tight trousers. In fact just like a double camelsfoot! That fat bird from The Gossip looks like she has two fannies. Two Fannies by Spunky Monkey August 12, 2007 0 0 Get merch Get the Two Fannies mug. Buy Now — $32.95 See more merch