Noun: An individual wearing a mask of your face, that ambushes you while you're taking a shit and starts enthusiastically fucking you. (in any orifice of the dumpleganger's preference)
Also refer to: Dumpelstiltskin
I barely had time to pinch a loaf before my dumpleganger burst in and started fucking my face!
One that possesses identic odiferous qualities when producing dung, flatulence &/or sharting as oneself, often referred to as a poop plagiarist.
"Walcott, you dirty dumpelganger, what hast thou eaten!?! You smell as though you've been raiding my refrigerator! Just yesterday I cleared the lobby at the country club with that famous sent & now you have cleared my sinuses with your own!
12 step recovery jargon referring to someone new who talks about how great life is, now that they're sober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.