STB

STB: an abbreviation meaning "soon-to-be"

Person 1: I'm getting married, next week, and I can't wait...!
Person 2: As your best man, and, with this being your stag do... I can't help but feel I should buy you an hour or so with a hooker...
Person 1: Well, I have way too much respect for my STB wife to do anything like that...! As my best man... you're fired.