Its when a group of little people (at least 4) dressed as monkeys are sent to kidnap a person, tie him or her up, draw penises all over him or her, piss on him or her, and crap in his or her mouth before walking away. Its named after a monkey in the famous show "Lancelot Link Secret Chimp".
While vacationing in California, my friend was the target of a Dirty Nance causing him to walk home from the beach smelling of urine and feces.
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1) Anyone whom acts less than manly in any situation.

2) One whom nances(takes too much time) when passing the bowl and therefore slows the entire rotation, demanifying himself in front of his bros.
Sir Nance A Lot over here hasnt passed the bowl in 15 minutes. Damn kolbi hustle up you nagger.
by west tx connection November 09, 2009
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