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Someone who is a moron, but typically not because of their natural intelligence, but because of the way they choose to act.
"Dude come on why are you acting like such a Belvin"
or
"Yeh you know Sam? Such a Belvin"
via giphy
by Joseph James Carroll November 13, 2019
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2
pelvis seen mostly on middle-aged women, the fatter part of the lower-belly that pants are pulled over, creating a small hump. Originated from our middle-school substitutue teacher, Mrs. Belvin.
"Her pants are so high because she had to pull them over her belvin."
"She's not fat, she just has a belvin."
by Madame Drexall March 25, 2005
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