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2.
Woman your husband/boyfriend dates after seven years of being together.

See seven year itch.
"I just happened to be downtown for lunch when I saw my husband with that seven-year bitch."
by AbnormalBoy September 15, 2004
 
1.
An american all girl punk rock band from seattle. Ironically the band lasted for 7 years.
The band Seven year Bitch named their band after the movie Seven year Itch.
by HKpinkstars February 12, 2010