noun
Describes someone who can drink a lot of alcohol without getting drunk; often used in a positive or admiring way.
彼は酒豪で、一晩に一升瓶を空けることもある。
He is a heavy drinker and sometimes empties a whole 1.8-liter bottle in one night.
酒豪の友達と飲みに行くと、いつも朝までコースになる。
When I go drinking with my heavy-drinking friend, it always turns into an all-nighter.