1: he gonna kill somebody.
2: ya thinks so?
1: best believe, man. best believe.
by KRHimself September 9, 2004
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Just a way of saying, you can bet on something to happen if a another event should occur
Person 1: I heard Rosa said she was going to fight you

Person 2: if she touches me best believe I will whip her ass
by tacoboutit July 3, 2017
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you best believe means that you better believe it, i’m not lying. if you say “you best believe” you are obviously telling the truth
john: what happened at carols party?
suzan: you best believe everyone was hammered
by farmerjessie December 7, 2018
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