Top Definition
An Incestuos lesbian. Two sisters that have sex.
Twins that have sex with eachother in a porn are incestbians.
de Amanda Ferguson 24 septembre 2007

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Two related females participating in sexual acts together.
Isn't that her sister? Yes, they are incestbians.
de Merideth Factsterburny 25 octobre 2010

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Noun,

1) 2 or more women in an incestuous relationship.

2) A lesbian who is attracted to members of her own family.
That girl hangs out with her sister too much, I swear, she's such an Incestbian!
de Gloria Fanderbuilt 27 octobre 2010

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