F.A.T. Share definition Flag Face, Ass, Titties. In order of importance. Used to describe someone who has the "whole package" Jimmy: "damn shes hot." David: "yeah shes got the F.A.T.!" F.A.T. by Jimmeh Herb September 20, 2011 0 0 Get merch Get the F.A.T. mug. Buy Now — $32.95 See more merch