Some people gotta punch the clock, man I rather punch a brick

from Lil Wayne (Ft. 2 Chainz) – Days And Days Lyrics on Rap Genius

Meaning

Some people work a 9-to-5 to make money, Weezy would rather cause physical pain to himself than get a “proper” job to make his money.

This line could also mean that he’d rather sell a brick (of drugs)

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