Top Definition
A person who is constantly grumpy, or occasionally suffering from a very high level of grumpiness.

A grumpustiltskin, is a term used for a major grumpus.

(No link whatsoever to Rumpelstiltskin)
"I've been trying to talk to her all night but she has a face like a slapped arse, what a grumpustiltskin!"

"Mate, how's it going....

Fuck off,
OOOOOOHHHH alright grumpustiltskin"
by nwest1 April 09, 2012
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