Bro-Cred is a method of payment between bros. When money is not available, the charge is placed on Bro-Cred to be payed back later. Bro-Cred is only used amongst those whom you trust.
Bro 1: "Oh shit dude, I only have 2 bucks in my wallet."
Bro 2: "Don't worry about it, we'll just put it on bro-cred."
"Fuck me man, after that last sack I'm up to $125 on bro-cred."