Good Drunk Meaning

(idiomatic) A person who is cheerful and companionable when intoxicated, retaining reasonable control of his or her mental and emotional faculties.

Example: 2004, Shane Watson, "drink," New Statesman, vol. 133, no. 4717, p. 56:
  In many quarters, "it is important to be a good drunk to fit in socially" (make that across the board if you are male).
2005, Karen Emmerich (translator), Vassilis Vassilikos (author), The Few Things I Know About Glafkos Thrassakis, ISBN 9781583226544, p. 108:
  He was drinking a lot back when I first met him. A real heavy drinker, but a good drunk. He never let his ugly side show.
2008, Geoff Coates, In June the River, ISBN 9780615255088, p. 142:
  The boss and my fellow workers were well aware of my drinking habits, but I had always been able to keep my wits about me. I was a good drunk, as they say.