Meaning good friends, similar to bro. The origin although believed ot be from anchorman is actually from, The Jamie Foxx Show. Braxton would always call Jamie brosef.
"Yo what'shappening?"
"Not much how about you brosef?"
A bro, who notices there are too many nerds at a party and kicks them out into the cold for the sake of the hosts street cred and to create a enhanced party atmosphere. Reminiscent of Stalin exiling academics to Siberia for the stability of the USSR.