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1.
An A-Cupper is a woman who tries very hard to get men to notice her, mainly in a slutty way. Similar to woman who sluttily flaunt their A Cup breasts.

No offense meant to real A-Cuppers- women who have actual A Cups.

See also D-Cupper.
Girl 1: Do you see Melissa over there, trying to impress Kyle?
Girl 2: Yeah. She's such an A-Cupper. Whore.
by je ne regrette pas August 22, 2011