No bullets? You're so full of shit
This clip is so full, it'll spit if I don't pull it

from Xzibit (Ft. Eminem) – Don't Approach Me Lyrics on Rap Genius

Meaning

He refers to his court case where he pistol whipped a bouncer for kissing his girl. The gun had no magazine (or clip) in it, he means that the removal of the magazine was intentional or he would have shot the guy

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