LMBFWGAO Share definition Flag Laugh my big fat white girl's ass off. Take off on LMAO. Person one: Hey! That guy's shirt looks like the ocean threw up on it. Person two: LMBFWGAO LMBFWGAO by calleyomalley November 8, 2010 0 0 Get merch Get the LMBFWGAO mug. Buy Now — $32.95 See more merch