1. Short-form for "Nah, bro."
Black guy #1: "Yo, look at dis cracka ass mother****er! Wan' me ta pop a cap in yo ass, G?"
White guy #1: "Nah B."
Black guy #1: "*boom*"
by So_Egotistical May 10, 2007
nah b as in "no..beyonce" in reference to the Jay Z and Beyonce song "Bonnie & Clyde '03" where Jay Z indicates to Beyonce that she is wrong.
Nah B...you trippin!
by jayzzz99 October 28, 2008

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