When a person defecates powerfully enough to (metaphorically) shatter the porcelain of a toilet. To shit your brain's out.
"Oh man, I just took a giant shit. I broke the porcelain!"
"I only shit at work because I don't wanna break the porcelain in MY bathroom."
"I only shit at work because I don't wanna break the porcelain in MY bathroom."
by I'm the Scatman April 19, 2017