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An Incestuos lesbian. Two sisters that have sex.
Twins that have sex with eachother in a porn are incestbians.
dodane przez Amanda Ferguson wrzesień 24, 2007
Two related females participating in sexual acts together.
Isn't that her sister? Yes, they are incestbians.
dodane przez Merideth Factsterburny październik 25, 2010

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!
dodane przez Gloria Fanderbuilt październik 27, 2010