Incesto 

It's like "no homo" but with family. Making sure that they understand that they are not down to commit the sexual intercourse with them. And kindly letting them know they are not about the incest life.

Cousin 1: Fuck you Jhasmine

Cousin 2: Ha gay
Cousin 1: no incesto

Incesto by Thottimusmushroom September 16, 2017

The Great Incesto and His Flying Sodomy 

A mythical creature who roams the streets of Philadelphia and persuades homeless junkies to sell their souls for pocket change under a legally binding contract. The Great Incesto is also rumored to have magically flown these "homeless junkies" into the sky and given them the ass raping of their life. It is also believed that The Great Incesto is the mother and brother of all homeless junkies, hence the name "Incesto". Contrary to textbooks and popular belief, The Great Incesto never carries his sodomy in a magic bag.

"Hey man, did you give that crackhead any money?"

"Fuck that, I'd rather watch him get his ass raped by The Great Incesto and His Flying Sodomy for 45 cents.

The Great Incesto and His Flying Sodomy by Bobby Baloney October 9, 2009

no incesto 

Phrase used after doing something sexual with a parent, sibling, child, grandchild, or any close relative to indicate that the act or comment was not incest.

brother- can i feel your smooth legs bro?

other bro - yeah just call 'no incesto'

no incesto by thatdirtychild June 13, 2010

Pseudo-incest 

Sex with someone with a familial relationship, but no blood relationship. Sometimes treated as incest in the law, but not as much of a taboo subject in common society.

"Dude, she's not my mom! She just married my father."
"So that's pseudo-incest. Still illegal in this state."

Pseudo-incest by Stevarooni September 11, 2016

incest porn 

Porn, only with incest, like mother and daughter, or father and daughter, or even father and son and mother and son. This shit is crazy.

1: "Damn, I jerked my sausage roll over some lover shit last night"
2: "What kind?"
1: "That Incest shit"
2: "Gotta love that incest porn"

incest porn by Joelfuckedhisnan-dos December 20, 2016

incest is wincest 

A phrase many anime fans use to describe/praise an anime/manga depicting incestuous relationship(s), usually between or among siblings.

"I just can't stand anime, man. Why is there so much incest in it?

"Bro, incest is wincest!"

incest is wincest by Yume99 August 11, 2016

incesting 

committing incest on a regular basis.

having sex with your mom on a regular basis would be considered incesting

incesting by Baybee Becky October 20, 2008