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3.
A lesbian who only licks her sister's twat.
That big dike is an incesbian.
by cm69 February 24, 2011
 
1.
a female who participates in a sexual relationship with another female relative (sister, cousin).
no one in the family quite knew how to talk about the sisters incesbian relationship.
by robin lillian July 16, 2006
 
2.
Incest/Lesbianism. The term is generally used jokingly.
Girl to sister: Aw, I love you! *Pecks sister's lips*

Sister to girl: I love you, too!

Bystander: Fucking incesbians...
by Carla Toolie August 26, 2010