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named after british singer emma bunton.

this word is mainly used as a verb but can also be used as an adjective. when a pretty girl from highschool grows into a stocky, busty and unremarkable woman.

can also be used to describe any girl who went from thin to gross at any time.
yeah that chick was skinny in school but then she just BUNTONED.
by chisolmlover February 17, 2010
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