The act of a family member totally making moves on another family member.
Adrianna: "So my cousin messaged me on Facebook, and he was all like, 'hey baby, good morning, i love you' and I got scared cuz I thought he was incesting me up so I signed out. Then I realized that his fiance has the same name as me."
Brandon: "lol awkward"
by zombiedinosaurseatyou January 29, 2011
committing incest on a regular basis.
having sex with your mom on a regular basis would be considered incesting
by Baybee Becky September 01, 2008

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