Cock Pet Share definition Flag A cock pet is when somebody (that's a male) pets a person's head or shoulders with an erect penis, usually from behind. Guy 1: WHY THE FUCK IS YOUR PENIS ON MY HAIR! Guy 2: I'm giving you a cock pet, calm down. Cock Pet by U4ICbicboi September 11, 2014 0 0 Get merch Get the Cock Pet mug. Buy Now — $32.95 See more merch