a person who spends much time in a bar or similar drinking establishment
a promiscuous person, especially a woman, who frequents bars hoping to find sexual partners
Abstaining from drinking any alcoholic drink, usually in the sense of having given it up (as opposed to never having partaken); teetotal.
Used other than figuratively or idiomatically: see on, the, wagon.
Maintaining a program of self-improvement or abstinence from some other undesirable habit.