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Doing it with your family members... commonly practiced by white people
redneck:"I don't believe in masterbation ,but i do believe in fucking my sister"

Jesus:"thats something i call incest"
incest by larry csonka February 26, 2009
To do sexual activities with a member of your family. (Brother, sister, dad, mom, aunt, uncle, etc)
Person 1: Is incest illegal?
Person 2: Yes, incest is illegal.
Incest by Bunnies! August 1, 2011
A sexual relationship with your mother while cheating on your wife.
Bill Clinton, don't eat your mom
Dude, don't spy on me!
Incest Smells like wet wet puppy, and corn chips, shoved in a horses butt.
Incest by DonkeyKongg1478 December 12, 2017
The act of having sex with somebody of blood relations, which can result in interbred (ie; dumb, ugly, deformed) offspring. Wisbech is such a place where incest is practised.
Pikey Bill: "Incest is real swell! Because of it, my mum is also my aunty!"
Incest by RD October 19, 2003
When you fuck your child up the ass, YOU SICK FUCK.

GET OFF YOUR CHILD. YOU INCESTUOUS FIEND.
<i>Incest Incest, Put your family to the test.</i>
Incest by Incestuous Relations September 28, 2003