....But somebody gotta do it.
Meaning: It is a sho nuff bitch to get up and make this mad paper but it will be worth it on pay day.
Sally M.D. at three am on phone with Suzy: "pimpin' aint easy"
Suzy:"but somebody gotta do it"
Then Sally will generally bitch about her job in one breath and talk about buying that Benz in the next breath.
In this context "pimpin aint easy" is used for call and response. A human interaction that most African Americans enjoy!