Porcelain Painting 

The process of having a bowel movement and inadvertently staining the side of the bowl.

I will be back in about 10 minutes, I need to go do some porcelain painting.

Porcelain Painting by Ninja Medic November 5, 2011

painting porcelain 

the act of defecating on such a large scale that the interior of a normally white porcelain toilet bowl is rendered an entirely different color, typically brown

"Jim, where are you headed off to in such a hurry?"
"I don't think that oyster burrito agreed with me. I'm pretty sure it's gonna have me painting porcelain."

painting porcelain by triebkore March 16, 2012

Painting the Porcelain 

When the food you pass explodes in the toilet and there is no white left to be seen

I had Mexican for dinner last night and within 2 hours I was sitting in the bathroom Painting the Porcelain. Why don't they just make toilets in brown?

Painting the Porcelain by Urban humor May 24, 2017

PORCELINE PAINTING 

WHEN ONE SITS ON THE TOILETTE AND SPRAYS THE BOWL WITH FECAL RAINBOWS CREATING A BEAUTIFUL PAINTING THATS PORCELINE PAINTING BABY

MY GOD I JUST SHIT ME A VANGO WHAT A GREAT PORCELINE PAINTING WORTHY OF A MUESEUM

PORCELINE PAINTING by SHANNON MOTOWAKAN September 25, 2011

pointing percy at the porcelain 

The act of pointing one's penis towards the toilet bowl whilst standing. Usually accompanied by urination.

"Jeff, your dinner's ready!"

"Give me a minute! I'm just pointing percy at the porcelain!"

pointing percy at the porcelain by John Superman December 6, 2013