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
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Get the incest is the best put your sister to the test mug.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
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by TrumpTheKiđkissingSexoffenđer. December 20, 2020
Get the Incest mug.by martha56 November 29, 2019
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The act of shipping or the existence of a couple that have a sibling relation ship or are adopted siblings
''omg did you read that JayDick fanfiction?''
''No dude! They're like brothers that's spiritual incest!''
''No dude! They're like brothers that's spiritual incest!''
by Insert Dorky Nae May 9, 2017
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