Big ol' Fat Head Share definition Flag 1.Having a dispraportionately large head that gets in the way of everyone. 2.Dumbass you got a big ol' fat head you bitch!!!! Big ol' Fat Head by Not so super DJ Gennady March 6, 2003 0 0 Get merch Get the Big ol' Fat Head mug. Buy Now — $32.95 See more merch