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1 definition by maxxus

 
1.
Slang term for the toilet when being used for an extended period of time, usually during an illness such as vomiting or diarrhea.
There was something wrong with the food last night, he's been riding the porcelain express all morning.

Don't drink too much, or you'll regret it later when you're riding the porcelain express.
by maxxus July 16, 2006