Friendship Incest Syndrome is an occurrence where you have a group of friends who have all dated and broken up with the same people, then you are eventually forced to be friends with an ex because they're still in your circle of friends - in fact they're probably dating one of your friends by now. It effects a small # of people, likely living in Southern California. It extends to Frenemies who have removed themselves from the circle whom you can never fully get away from.
I'm going to a concert tonight, oh jeez, Robin & Joe are going to be there...Friendship Incest Syndrome (FIS).
by Ms. Woods July 7, 2010
Get the Friendship Incest Syndrome (FIS)mug. 
Get the incest is the best put your sister to the testmug. Brent Austin Miller (terrorist) from Lytton, Iowa fucked tiffany johnson also from Lytton Iowa when she was 13 and he was 18 and then again when he was 19 and then he took his sister to her senior prom and tried to get laid........he succeeded he also has a gay ass jewfro and a small dick that didnt please tiffany or his sister.
by chandlerjepsen11 September 30, 2012
Get the brent is a pedophile and incest loving jewish bitchmug. Having to do with the word incest. "Incestful" is street slang for nasty cousins who are trying to be together, or trying to be more then cousins.
by Flabbyjackers January 11, 2017
Get the incestfulmug. When someone named adam has sex with his own parents and then fucks his own dog and his siblings in a massive orge and then mates with a plane and hijacks it and crashes into the twin towers.
by Snorkel August 23, 2023
Get the Adam incestmug. Borat's sister.
Incest= Borat's sister
Borat:"here is my sister"
*Proceeds to eat out her face*
Borat:"she is no.4 prostitute in whole of kazakhstan.Niicee"
Borat:"here is my sister"
*Proceeds to eat out her face*
Borat:"she is no.4 prostitute in whole of kazakhstan.Niicee"
by EvanTheAryen November 18, 2020
Get the Incestmug. by ThorMonster April 7, 2016
Get the economic incestmug.