Witch's cauldron 

When you give a courtesy flush while taking a dump, but the water level touches your balls/penis.

Something similar to this is the witches kiss.

Oh crap I just got the witch's cauldron while taking a shit.

Witch's cauldron by Witches kiss March 1, 2017

Witch's Cauldron 

To cup ones hand over the anus in the shower, forming a tight seal. Once filled, fart into the water, making a bubbling cauldron sound.

Sorry about the smell in the bathroom, I made a particularly bubbly Witch's Cauldron.

Witch's Cauldron by jeezihavenfi March 12, 2009

witch's cauldron 

To pee in someone's ass while they're farting so that the pee bubbles like a cauldron.

Dude, Josh totally gave Tiffany a witch's cauldron at the superbowl party.

witch's cauldron by Mekkanism January 31, 2008

The Witch's Cauldron 

When a woman expels air from her vagina with such force that bubbles are produced in and around the entrance.

"Mate, I was giving head to this girl after doing her from behind only to be greeted with a witch's cauldron."

"Man, this girl queefed so loudly, I bet she produced the witch's cauldron."

"I would love to add some milk of man to HER witch's cauldron."

The Witch's Cauldron by beefdiaries March 5, 2014