An Incestuos lesbian. Two sisters that have sex.
Twins that have sex with eachother in a porn are incestbians.
von Amanda Ferguson 24. September 2007
Two related females participating in sexual acts together.
Isn't that her sister? Yes, they are incestbians.
von Merideth Factsterburny 25. Oktober 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!
von Gloria Fanderbuilt 27. Oktober 2010

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