Shatlass 

going to the bathroom to take a shit yet your ass is too large to fit on the small school toilet so you unintentionally poop on the floor.
Also named after a chunky ugly hairy male/female lookin kid in NC

Bobby "Yo I just pulled a Shatless and it stinks in there, plus the fan isnt working"

Sue "Oh my Bobby. You pulled a Shatlass!? Not only are you butt-ass ugly, but your hygeine also smells. No pun intended!"

Shatlass by Stanhope April 6, 2007

mushy shatass 

When a person shits in thier wetsuit while paddleing a surfboard out to the line up

Peter gambled and lost, and thus has mushy shatass

mushy shatass by downtiggidy August 17, 2003

Shatass

Not to be confused with the derogative term, fatass, a shatass is someone who has eaten excessively to the point of immensely needing to shit.

Guy 1: Where we tryna eat?
Guy 2: I don’t know dude... I’m down for anything other than Mexican food.
Guy 1: What’s wrong with Mexican food?
Guy 2: Last time I ate a burrito, I nearly shat my brains out.
Guy 1: Haha, you’re such a shatass!

Shatass by JakeHasUD March 16, 2019

shatass

sharting when someones dick is in you ass.

guy 1: ay dude why you shatass last night?

guy 2: im sorry but it feels so good to shatass!

shatass by cookie dunker January 23, 2022

Shatass disease 

persistent shitting of your ass. usually diahrea and/or mud butt

Damn! I keep shitting my ass.
Looks like you have Shatass disease.

Shatass disease by stu lanely April 25, 2006