A set of established protocols governing the responsibilities of a man in an interpersonal relationship with his friends(bros).
If a man's friend(bro) is preparing to hook up with a fat, ugly, or otherwise disfigured girl; it is S.O.B. (Standard Operating Brocedure) to warn him not to. However, if said warning is unheeded, it is also S.O.B. to ridicule and otherwise attempt to humiliate said chubby-chaser by making jokes, coming up with nicknames(see:chubby-chaser), pictures, and any and all other forms of torture.