Mailbox money

“??We've been earning mailbox money for six years now.?”

“I'm maxed out, like a credit card with zero balance I'm racked out, mailbox money, getting paid for my talents" - Detroit L-O, Stay Out The Way Friday.”

“Ain't no way I'ma forfeit this, Mailbox money, I'm Forbes list rich" - Russ, Own My Masters.”

“Cartel mailbox money so dirty you could smell my money" - Gucci Mane, Poppin.”

“Yeah nigga, that?s that mailbox money And I'ma blow it like my nose is runny" - Maez301, Change (Intro).”