I ain't come in this bitch to party, I came in this bitch to fight
Although I can't stay here to fight cause I'm popping niggas tonight
That's right bitches I'm drunk with revenge

from Eminem (Ft. D12) – One Shot 2 Shot Lyrics on Rap Genius

Meaning

this mugs pissed as a mother fucker because the guy from befor was shootin up the place and he learned the dude is here so he came here to kill the man

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