Doin’ me but you'd do me too
I’ll be me, my nigga, you be you
I guess that men can be groupies too

from Joe Budden (Ft. Juicy J & Lloyd Banks) – Last Day Lyrics on Rap Genius

Meaning

Calling his male haters homosexual saying they’d “do” him too.
He’s suggesting you worry about yourself and he’ll worry about himself.
“Groupies” are girls who’d do anything to get close to or have sex with a band or artist; Calling his haters groupies.

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