incestating

The act of dating your sibling.

Mom: Where are you and your brother going?
Mary Sue: Billy Bob and I are going incestating!
Billy Bob: I'm gonna' get me some of that good sister lovin'.
Dad: Billy Bob, you know I shoot at anyone who tries to date yur sister, but since you are my boy I guess I'll let it slide tonight.
Mom: Have a good time and practice safe sex you silly kids.
Dad (to Mom): Come on and watch TV with me, it's our favorite show, "All in the Family".

by The Evil Minister March 1, 2006

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incesting

committing incest on a regular basis.

having sex with your mom on a regular basis would be considered incesting

by Baybee Becky September 2, 2008

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Incest

Having sex with members of ones own family.

Incest, the game the whole family can play.

by JJ July 30, 2003

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Incestion

Getting your own mother pregnant, then getting that daughter/sister pregnant. Therefore, it's a sister within a sister. Inception + Incest = Incestion

Woah, you got your mom pregnant? Then that child? INCESTION!

by Lily69 March 6, 2012

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