Herpty Derpty Share definition Flag That one guy that you always get stuck with when playing Halo. Kinda like a more retarded humpty dumpty. We would have won that last game if it wasn't for fuckin' herpty derpty. Herpty Derpty by mattttt_daaaaaamon April 21, 2011 0 0 Get merch Get the Herpty Derpty mug. Buy Now — $32.95 See more merch