Mud snail 

Thst act of taking a dump on your SO’s back in a swirl (ice cream like) formation. And then allowing it to slid down their back and leave a snail trail.

Boy: damn, kate is a freak.
Other boy: oh really what did she do on her last tinder date this time?

Boy: she mud snailed the poor guy
Other boy: damn you rite she is a freak....what’s her number again???

Mud snail by Gabbagabbayoyo March 15, 2018

Mud Sailing 

When you pee and take a shit at the same time. Most notably when you have food poisoning or had a beefy 5 layer burrito from Taco Bell.

Dude how's your stomach? Bro I been mud sailing all day from that burrito.

Mud Sailing by Jermeiser October 6, 2016

New Zealand Mudsnail 

The act of having your SO laying upside down and taking a dump on their “downstairs” in a swirl (ice cream like) formation. And then allowing it to slid down their front to their face and leaving a snail trail.

I was doing Matilda dingo style. I pulled out and gave her a New Zealand Mudsnail and it waltzed all the way down to her mouth.

New Zealand Mudsnail by Shit Slider September 17, 2020