When you need to piss so incredibly bad, that you may possibly tear up the cermamic of the toilet / urinal. Replaceable with phrases such as, "I'm going to carve my name in that ceramic!". This phrase is commonly used when letting go enormous amounts of urine while out for a night of drinking.
I need to piss real bad after all that drinking, nevermind breaking the seal, I'm going to tear up some ceramic.
I really need to tear up some ceramic; I may even carve my initals in that toilet.