Top Definition
A mythical creature that dwells in dark, damp places, eg. under your bed, under a bridge, or in dustbins. First appeared in 18th Century folklore, a Gribben is known to feed on children, human hair and small rats. Gribben's reproduce by excreting in the mate's mouth and then regurgitating back into the others'. The creature is described as small with spindly legs, a big neck and dirty claws, usually with fungal matter growing out of it's ears.
"Where's Fred?"

"He just got decapitated by a Gribben."

"Bad luck, I liked Fred."
by phil090 January 20, 2012
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