The lesbian equivalent of a beard.
A male who is used by a female who is either lesbian, asexual, or bisexual -to go out with and perform couples activities to appear straight. Sometimes even used for marriage.
Carol: OMG Did you hear Maggie got married last summer?
Karen: No? I thought her parents didn’t approve of Kelly.
Carol: Oh, they don’t, she married their mutual friend Adam as a skirt .
Karen: Ohhhh, that makes sense, he’s gay anyways. So she’s a beard now?