Top Definition
Foreign Bowl Syndrome (FBS) is a real and common disease among 78% of Americans, a statistic I made up for this definition, in which a person has to withhold a bowel movement (BM) because the toilet isn't the one at home.
Tim: "Damn bro I have to take a poop."

Chuck: "Well then just go dude"

Tim: "I can't just 'go' I have FBS!"

Chuck: "What's that?"

Tim: "Foreign Bowl Syndrome. I can't trust any toilet bowl other than my own."

Chuck: "You're an idiot."
by CPeets July 04, 2010

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