When you are on the verge of taking possibly the most disgustingly smelly, nastiest, painful, room clearing, eye watering, breath shortening, leg falling asleep shit ever...period.
Usually performed at the most inopportune time imaginable:
1) The company picnic where toilet paper is not accessable.
2)Your new girlfriends parents house when meeting them for the first time.
3)While driving the hottest chick home from the bar.
4)At a funeral.
5)At a wedding
6)In church
7)At a sorority house while in the midst of strip poker
8)Before or during a threesome with twins.
9)When cuffed in a police car, or in jail.
10)While attending a sporting event with "open stall" bathrooms.
11)at any store or restaurant without locks on the single throne bathroom.
12)At your inlaws.
A shat mcnasty is the shat of all shats, the dump of all dumps, the king of all craps, the morning after eating at any mexican taco stand.
Usually performed at the most inopportune time imaginable:
1) The company picnic where toilet paper is not accessable.
2)Your new girlfriends parents house when meeting them for the first time.
3)While driving the hottest chick home from the bar.
4)At a funeral.
5)At a wedding
6)In church
7)At a sorority house while in the midst of strip poker
8)Before or during a threesome with twins.
9)When cuffed in a police car, or in jail.
10)While attending a sporting event with "open stall" bathrooms.
11)at any store or restaurant without locks on the single throne bathroom.
12)At your inlaws.
A shat mcnasty is the shat of all shats, the dump of all dumps, the king of all craps, the morning after eating at any mexican taco stand.
Dude: "what happened last night after I had to leave?"
Dude 2: "the Olsen twins lost their hand in strip poker and got naked looking for you....where did you go?"
Dude: "after eating all that mexican food and drinking that pisswater they call beer, I went to the ihop and took a shat mcnasty. I blew it out in there and cleared the place, I think they called the fire department."
Dude 2: "did you go home and shower after that?"
Dude: "I had to"
Dude 2: "the Olsen twins lost their hand in strip poker and got naked looking for you....where did you go?"
Dude: "after eating all that mexican food and drinking that pisswater they call beer, I went to the ihop and took a shat mcnasty. I blew it out in there and cleared the place, I think they called the fire department."
Dude 2: "did you go home and shower after that?"
Dude: "I had to"
by rileyriley April 29, 2010
Get the shat mcnastymug. by antony davies July 23, 2005
Get the shat upmug. by K-box June 25, 2005
Get the Shatmug. by jeff o. May 13, 2005
Get the shatmug. Literally, the act of mastering shat; asserting your natural authority over God's putty; indulging in a dance under chocolate rain. Also, dominating a predictably submissive William Shatner.
"Wow, I had no idea you were into shat mastering... Are you busy tonight?"
"Look at that shat master! He's totally giving it to the Shat!!"
"Look at that shat master! He's totally giving it to the Shat!!"
by Narwhal Rider March 2, 2009
Get the shat masteringmug. to feel the urge of some nasty quickly flowing excrement about to blast out of your ass.
similar to having mud butt but moves much faster.
similar to having mud butt but moves much faster.
he suddenly turned pale, and started walking funny as he walked stiffly to the restroom. I think he has a case of the goose shats.
by borWorm February 13, 2007
Get the goose shatsmug. by gtechgurl February 23, 2014
Get the shat chatmug.