You fucking with the drum major don't make me play you the anthem

from Lil Wayne (Ft. Gudda Gudda & Jae Millz) – Bang Bang Lyrics on Rap Genius

Meaning

Wayne is comparing guns to band drums, then the “anthem” is gonna be a whole lot of gunfire — and if you play like my drummer, that isn’t too different from someone banging the drums.

And as the drum major here, Wayne is the king of all (gang)bangers.

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