ride the porcelain pony

ride the porcelain pony

slang To sit down on and use a toilet, especially when one has diarrhea. Something didn't agree with me at dinner, because I've been riding the porcelain pony on and off for the last few hours. Please don't be on your phone while you're riding the porcelain pony—that's a good way to spread germs around the whole house!
See also: pony, porcelain, ride