Shitting lava 

Highly acidic diarrhea resulting from spicy food or stomach upset.

GAAAWD, I am shitting lava after the Burrito buffet!

Shitting lava by I, Wreckerrr November 11, 2016

shitting Irish 

When you shit green turds.

I must have the flu I'm shitting Irish.

shitting Irish by jpg3 February 1, 2015

shitting like a goose 

The state of having extreme diarrhea. The art of peeing out of your asshole.

Boss: "Are you coming into work today, Bud?"
Joey: "I'm not going to make it today, Boss. I got ahold of some bad street tacos last night and I'm shitting like a goose this morning."

shitting like a goose by #1SMTX October 3, 2015

binge-shitting 

What naturally happens following binge-eating.

After a particularly intense and protracted eating episode, I passed out during the binge-shitting phase.

binge-shitting by Dr Bunnygirl March 7, 2018

shitting in stereo 

a situation where, in a public bathroom with multiple stalls, two people in adjacent stalls are taking a pungent shit simultaneously, creating a collective smell from both stalls that leaks out of the bathroom and into the nearby hallway.

No, Malcolm, I will NOT shit in that stall. Do you not see the dude in the stall next to it laying a mud monkey? I am morally opposed to shitting in stereo -- mono or no go for me.

shitting in stereo by Peven glugh November 25, 2011

Properly Shitting 

You lift up your shirt, wear your pants backward, do a handstand, and take a big shit through your zipper hole. Then you ask your mother once she is finished with her dinner if she could kindly wash your nutsack.

Hey man, I just took the biggest shit of my life.
Did you make sure to lift up your shirt? Its a common courtesy thing.
No, I wasn't properly shitting.
*GASP*

Properly Shitting by SpectralCuckSlayer February 2, 2018

shawshank shitting

the act of using surrounding noises to strategically defecate in a public restroom. taken from Tim Robbins' escape from the fictitious "Shawshank Prison," wherein he bludgeones a large sewage pipe with a rock, striking the pipe only when the thunder from a lightning bolt is loud enough to mask the noise of his stone as it strikes metal.

man, i had to crap so bad! but i knew with only one other guy in the bathroom, shawshank shitting just wouldn't be an option.

shawshank shitting by LobsterRodeo September 20, 2009