Top definition
B.T.U meaning bet that up, you say this when your gonna get revenge on someone or your agreeing to do something together and your lowkey excited about it.
Bro#1: Hood bro im bouta come scoop you we finna hotbox.
Bro#2: Ight B.T.U my guy

Or
Brother: OMG ON GOD WHO ATE MY LEFTOVERS!!!
Sister: I Did

Brother: On God bet that up(B.T.U)
by Vonnies_Wrld August 05, 2018
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