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A some-what chavvy term for something unpleasant smelling,and or disgustingly presented
Jay: did you see Emily last night dude!?
Fred: yeah,man she looked umma dinging

Dan: Did you just fart?
Gareth: Yeah man,why?
Dan: cos its umma dinging!
by Ifitaintheavymetalitaintshit. October 12, 2009
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