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When you have marijuana in your possession and a friend who has no money to throw down on it and is asking to smoke for free and says "burn me up".
person 1: yo im about to go burn a blunt

person 2: i got no money rite now, you tryna bmu?
by passthetreesplease420 March 14, 2011
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2
by Aesc February 22, 2008
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3
an acronym for the phrase "betweeen me & u" -- let's another person to know to keep what is being said a secret
"bmu...I think he's kinda hot, even though he has really yellow teeth."
by tt2563 August 12, 2008
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