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A person who pretends to hide his/her drinking problem, yet everyone knows what a drunk mess they are.
Brandi likes to take shots alone in her room, then come out and stumble around the apartment. She's such a closet drinker!
by neotheo April 20, 2009
Person who sits in his/her home and consumes alcoholic beverages in a manner that would otherwise be considered a party. Also look up "loser" and "virgin".
That guy is such a closet drinker.
by annonymous2u February 12, 2011