Top Definition
A lazy, stubborn wanker with bad posture.
Julie: That sloth pushed in front of me and stole my place in the line just then and he refuses to move.
Russell: Which one is he?
Julie: The tall, skinny, slouched dude over yonder who thinks he's really cool.
Russell: What a slumpwank.
by Glaw-Dogg July 18, 2009
5 Words related to slumpwank

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