shisgasm 

Shisgasm, when said laid has had her chin rest removed from between the vagina & anus. In this situation climax is also referred to as shisgasm, due to the sudden exertion of urine & fecees (piss & shit AKA 'shiss'.

Oh my good lady, you have just performed an almighty shisgasm all over my stump.

shisgasm by Shissy April 18, 2018

Shitgasm 

The State of relief and euphoia just after unleshing a giant crap(or perfoming "Shock and Awe") from your body... usually accompanied by a long sigh of relaxation as your sphincter retacts to its normal state. Much like the state of relaxation after an orgasm... kinda...

"I shitgasmed twice already this morning... its gonna be a good day!"

Shitgasm by JadeHawk June 8, 2004

shigasm 

the wonderful feeling of release caused by dumping a shit either so powerful or forced to be held in until the last possible moment ("the crowning"). Can be either a verb or noun.

He experienced the bliss of a shigasm in the gas station crapper after a 3 hour, Red Bull and french fry road trip

shigasm by Brett from Cincy November 4, 2007

Shitgasm 

That really good feeling you get after taking a big shit

Guy: I took a huge shit like 5 minutes ago and now i'm having a really great shitgasm.

Shitgasm by me123abc January 14, 2009

Shitgasm 

When an individual releases the excrete that has been building inside of his or herself for hours. This is proceeded by a euphoric relief.

"Gregg, ever taken a shit that just felt so right"
"Oh, you mean a shitgasm, totally!"

Shitgasm by Michael Mitchell and Gregg Monastyrski February 6, 2008

Shitgasm 

N. The Best part of feciation. A moment of infinite awesomeness.

Boy: ohh, yeah! Yes!
Mom: honey, whats going on?
Boy: nothing, mom. Just having a shitgasm on the toilet.

Shitgasm by StarRockerGuy January 14, 2010

Shitgasm 

The incredible feeling of taking a long anticipated shit.

I had to shit for hours and couldn't find a toilet; but once I did I had the best shitgasm of my life.

Shitgasm by sbsmike January 21, 2013