Dark Timmy Share definition Flag When you have anal sex w/ ur partner and ur partner shits on your penis and you stick it in his/her mouth I gave this nasty bitch a dark timmy becasue she wouldnt shut the hell up Dark Timmy by Max Alden May 13, 2005 0 0 Get merch Get the Dark Timmy mug. Buy Now — $32.95 See more merch