it's a contraction of the words "must" and "have" but in the context of something being a "must have."
I'm going to get a pair of those New Balance 574s, they're a must've.
by snalker1 November 9, 2020
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A contraction of the words "must" and "have"
I must've left it some where.
by eleventhtoe October 22, 2011
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