What is Surprise Bowel Movement?
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aka SBM, when you think you are just going to the bathroom to take a piss, and you unexpectedly have the urge to poop.
"Dude, what took you so long to piss? Did you fall in?!"
"Nah man, I had a Surprise Bowel Movement."
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even if miami does try to claim that they were the first to put subs in a car,they still dont compare to dat Bay Area knockers or slappe..