LSHMDH Share definition Flag An internet slang term that means Laughing So Hard My Dick Hurts.It was created by a couple of guys while using YIM. Two people talking on YIM Guy 1:I just gave this girl a Donkey Punch Guy 2:LSHMDH LSHMDH by A.A.R. December 12, 2006 0 0 Get merch Get the LSHMDH mug. Buy Now — $32.95 See more merch