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