Booze coordinator
A person among a group of friends that decides who needs to drink more and who needs to stop drinking. This person is something of a combination between the drink police and a booze bouncer.
Dude 1: "Dude you need to stop drinking! We're gonna play some drinking games later and you're already wasted! And you over there... you didn't drink enough, stop being a sissy!"
Dude 2: "Fucking booze coordinator, mind your own business!"
Dude 2: "Fucking booze coordinator, mind your own business!"