incestimos 

When You And Your Sibling Have Shared The Same Sexual Partner

Older Bro: Hey Bro, Did You Sleep With Brittany Last Night?

Younger Bro: Yeah Man!

Older Bro: No Way! I Hit That Last Month! Guess Were Incestimos Now!

incestimos by AndyFox136 November 8, 2015

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!

Incestion by Lily69 June 13, 2012

incesties 

playing footsies with your relatives.

it's okay to play incesties with your cousins, but not to bang them.

incesties by smithfamilyreunion10 July 17, 2010

incestians family 

A family that has a lot of incest and weirdness but still loves each other a bit like Alabama

I’m part of the incestians family they are a bit strange

incestians family by Phoenix 123 August 7, 2020

Incestioussexual 

One who is sexually attracted to their biological family member

If I fuck my mom, does that make me an incestioussexual?

Incestioussexual by Sketti-Butters June 2, 2021

Incestmolestfest 

A festival of love involving at least 6 parties who are related in some way. This amazing event may bridge the gap of statutory rape many times over.

This holiday I will be attending the best incestmolestfest out west. Lest you request a bill for the mess, I will have you know it will be the best. Sisters and mothers, fathers and brothers, all are welcome to the incestmolestfest.

Incestmolestfest by Blotcht August 26, 2014

incestimate 

Any evaluation of a number by a company of its own data in its own best interest.

Twitter incestimated in a filing on Monday that false or spam accounts represented fewer than 5% of it's monetizable daily active users - Reuters.com

incestimate by rev matt May 13, 2022