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1.
Adjective. Can be applied to grotesque images and video (or anything) that force the depraved (generally online) masses to watch them out of pure sick/perverted curiosity (example: 2 Girls, 1 Cup)

Can also be applied to things of exquisite beauty.
"That paraplegic midget porn is pure trampgash"

Hot girl walks in: "Mmmm...trampgash...."
by K_ntface June 22, 2011