Incesturbated 

When you fuck the other sex version of yourself.

Turns out the girl i fucked, was the female version of me from a parallel universe.
My face when i just incesturbated .

Incesturbated by Cerez-X March 10, 2018

Investurbate 

When you can't determine whether something is hot or not, so you decide to put it to the masturbatory test.

I'm 50% certain this HomeGoods ad is heating me up, but I'm not sure. Time to investurbate.

Yahoo Answers couldn't tell me whether or not I'm sexually attracted to Ansel Adams' photographs, so I had to do some ground-level investurbation. I'm not. We're good.

Investurbate by asthmaticdan October 20, 2015

Incesturbation 

To have sex with your clone.

I engaged in some hot incesturbation last night!

Incesturbation by livejamie June 7, 2004

Incesturbation 

When you clone yourself and then have sex with the clone.

The University loaned me their cloning device; I've always wanted to try incesturbation.

Incesturbation by lclaymaz May 15, 2015

Incesturbation 

Jerking off or masterbating while thinking about one of your family members

I had a two hour incesturbation session last night thinking about my moms hairy muff

Incesturbation by doing mom September 26, 2006

Incesturbation 

The act of having sex with your clone.

"Gosh, mom! Knock before you just barge in! I was incesturbating!!!"
"Oh Lord! When did incesturbation enter this home!?!"

Incesturbation by Korgul December 4, 2009

Incesturbate 

To masturbate your identical twin.

"What did you guys do last night?"
"My twin brother and I attempted to incesturbate for the first time"

Incesturbate by Garooshnar December 20, 2016