"Drunk" indeed is a question of how you define it. Some people like to say:
"As long as you can lie on the floor without clinging to anything, you're not drunk."
But seriously, I've stopped getting wasted so badly that I vomit or anything like that. It's become very rare since then, maybe once or twice a year.
Oh, and Leagle: I even met a guy from Ireland who was not only non-smoker and vegetarian, but also teatotaller! When we watched the final of the European soccer championship in a Mexican restaurant & cocktail bar
during Happy Hour, he drank milk! 8o An Irishman! 8o There are some strange things going on on this planet... o_O