Abstemious

Abstemious- not self-indulgent; self-disciplined

Ex: It must be pretty hard to make friends if you’re the one abstemious guy in Ireland who can stop himself from boozing after just one Guinness. You just have to sit there, sober, as your daft redheaded friends muck down a Dublin spice bag, curry all over their orange mustaches, proceed to play “pin the tail on the bog-jumper” by blindly trying to throw a metal dart into soft pink flesh of a local greenkeeper’s buttocks, and then planting a Glasgow kiss on the first knob to start running his mouth about why Ireland just weren’t good enough to take down the All-Blacks in last year’s Rugby World Cup.