Friendship Incest Syndrome (FIS)

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

Incesturbation

To have sex with your clone.

I engaged in some hot incesturbation last night!

by livejamie June 7, 2004

investerection

The sexual arousal caused by a stock portfolio that is making positive returns.

This bull market is giving everyone on Wall Street an investerection.

by Germankid September 3, 2016

Incestigate

When a sibling detective squad hooks up with each other during or after an investigation.

After solving the Mystery of the mysterious mystery, The Hardy Boys went back to their place to Incestigate. All Night Long.

by androoxc November 2, 2009

incestry.com

A website for Appalachians to find out how they are related to the Lannisters.

Dude - I was on incestry.com and I now know why my sister Jamie is so fond of me!

by DescentIntoMadness February 5, 2017

materno-incestuant

Also non-hyphenated, maternoincestuant.

A person who engages in incestuous relations with his own mother. Sometimes referred to as a motherfucker.

The term may have use as in insult.

Tom's not very smart. If we call him a materno-incestuant, he probably wouldn't know what it means.

by dword October 1, 2008

economic incest

Screwing a family member on a business transaction.

He paid his sister so much below market value for that property that it was economic incest.

by ThorMonster March 29, 2016