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

shigasm 

the release of a shit so strong and/or urgent that its rapid plunge from your ass feels so good it's almost orgasmic. Hence, shigasm

after a 3 hour, non-stop, nacho fueled car trip, you're guaranteed to produce at least one shigasm at the first QuikiMart crapper you sit your ass upon

shigasm by Brett from Cincy October 25, 2007

Shigasm 

The act of orgasming so hard that one starts to defecate oneself.

Lorenzo: That movie was totally pwnage.
Alex: I kno...it almost made me shigasm.
Lorenzo: So thats wat i be smellin...

Shigasm by Havik8(The Cuban) March 5, 2008

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

scigasm 

For the scientist, it is the intellectual pleasure that accompanies obtaining really cool f***ing data from an experiment.

Thad looked at the results from the western blot and had a scigasm.

scigasm by Hellboy1 January 14, 2008

shitasmia 

A blend of vertigo, disgust, anger and embarrassment, such as felt when watching one of Microsoft's spectacularly cringeworthy "Windows 7 Launch Party" videos.

Coined by Charlie Brooker writing for the Guardian.

Did you see Microsoft's Windows 7 launch party video? It was shitasmic!

I have the most awful case of shitasmia from cringing so much at the goofy acting in that show.

shitasmia by Heath Raftery November 3, 2009

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