Functional alcoholic 

Someone who can maintain an orderly, outward social appearance while their personal life has devolved into complete chaos due to over-drinking. Their friends and family are often impressed with their achievements, while the alcoholic knows that their drinking has lead to a full-blown loss of control and that it is just a matter of time until their behavior blows up in their face. In a bad way.

Emelio's friends/family: " Emelio is about to graduate med school. We are so proud. We only wish we could accomplish as much".

Emelio: "I am a functional alcoholic. Everyone I know thinks I'm doing great but in reality my brain has turned to slush. I can't believe I BS'd my way through med school and got a 3.8 GP because I don't remember any of it. I can't believe I'm almost 30 and have somehow avoided getting a DUI thus far. Everyone thinks I'm so great, but in reality, I'm totally fucking dangerous but I just haven't been caught yet. It's all catching up with me though. It's only a matter of time until I do something really stupid and everyone will realize what a fuck-up I truly am.

Functional alcoholic by ???s upon ???s September 1, 2016

functional alcoholic 

a worthless yet admirable person who can drink everynight and still pull good grades in college or act as a normal person in a work environment.

that bitch drinks every f'n night and made a better grade than me on the test.

Or:
i saw that douche torn up last night and today he acts like mr. super employee. wtf?

functional alcoholic by d May 13, 2005