gumpfest Share definition Flag The act of 3 or more special needs individuals engaging in sexual activities. This is derived from the word "gumping". "hey bro did you hear about the gumpfest that happened a week ago" gumpfest by Rando on the street April 18, 2024 0 0 Get merch Get the gumpfest mug. Buy Now — $32.95 See more merch
