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1.
A brothel.

Etymology: Since the Elizabethan era, nun has been slang for a prostitute (ref. William Faulkner, "Requiem for a Nun"), and a nunnery referred to a brothel.

See also: Abbess, Bordello, Brothel, Nun, Whorehouse
"Polly Adler, in her memoir 'A House is Not a Home,' tells of her time as the abbess of the Big Town's poshest nunnery."

Walter Winchell, 1953
by Twathenge April 10, 2006
 
2.
1. slang for "whorehouse" in the times of shakespeare
2. a convent
"get thee to a nunnery!"
by vernizzle August 10, 2005
 
3.
1: Slang term for convent; itz wea da nun's crib at.
2: The act of living your life in poverty, chastity and obedience. To act like a nun.
1:"It's right past that nunnery on the left."
2:"We don't take kindly to nunnery 'round here!"
by pat (as in the onomatopoeia) July 11, 2005