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1) An insult, cross between that sesame street character and a twat.

2) A twat that hangs down real low and is very hairy, most likely from the dinasaur days before they had advance shaving blades.
1) Dude, you need a haircut, you look like a muffleufagus!

2) Yo, yo, thank ho had a muffleufagus so big, a terradactle was nesting up in there.
by Dwight July 14, 2005
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