jumtack Share definition Flag An absolute retard, fuck-wit, knob-cheese, delinquent, prick, and JUMMY Lauren Kelloway, No, Aarron, put that back! no, don't drop it. " I love dicks " " what a jumtack. " jumtack by [InsertNameHere] April 30, 2008 0 0 Get merch Get the jumtack mug. Buy Now — $32.95 See more merch