Man, fuck it, I'm 'bout to catch some wreck

from Royce Da 5'9" (Ft. Eminem) – Writer's Block Lyrics on Rap Genius

Meaning

Possible another drug reference, or this could mean to destroy someone on the mic. It could also mean that Em is going to wreck another chick (i.e. your girlfriend).
Or just get into some reckless behavior.

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