Moo Head Share definition Flag A really lame faggot guy that goes around messing with girl's emotions. A moo head makes a girl believe he likes them then suddenly without warning, stops. "Willy is such a moo head. That relationship was a mistake. He just screwed with my emotions." Moo Head by Love&Hate March 10, 2009 0 0 Get merch Get the Moo Head mug. Buy Now — $32.95 See more merch