The unit don't play we rap but we strapped
Buck got the shotgun, 50 got the mac

from Lloyd Banks (Ft. 50 Cent) – Cake Lyrics on Rap Genius

Meaning

Unlike most artists who claim they’re still gangsters while rapping when they actually aren’t — G Unit are actually strapped (carry guns) and are still gangsters even though they rap.

To help improve the meaning of these lyrics, visit “Cake” by Lloyd Banks (Ft. 50 Cent) Lyrics and leave a comment on the lyrics box