1) A female who talks excessively.
2) When your girlfriend keeps talking during the big game

Example:
Roger: Hey, have you seen Rachel around?
Josh: No. Why?
Ralph: I saw her last night, and man she is just a chattering vagina. She wouldn't shut up.
Example:
Girlfriend: Blah blah blah blah, and blah blah blah blah.
Boyfriend: Stop being a chattering vagina, we are trying to watch the game!

Synonym: Chatty Cathy
Antonym: Talking Tom
She is such a chattering vagina, she just wont shut up. macronacular chatty cathy talking tom
by the woo March 26, 2015
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