Foohan O'Doohickey Share definition Flag A leprechaun who screws your mom as you sleep. Oh shit, Foohan O'Doohickey screwed James' mom last night. Foohan O'Doohickey by Ammz September 1, 2010 0 0 Get merch Get the Foohan O'Doohickey mug. Buy Now — $32.95 See more merch