Ullmark Share definition Flag When a guy creates a decoy igloo in order to capture a moose so he can fuck it. Guy 1: Have you seen Jebediah? Guy 2: Yeah, he's outside ullmarking. Guy 1: Poor moose.... Ullmark by Little Big Toe December 14, 2011 0 0 Get merch Get the Ullmark mug. Buy Now — $32.95 See more merch