1 definition by butt master

Top Definition
After taking a massive shit and wiping, Poo Bum is the last bit of shit that won't go away. Usually noticed after getting up and walking around for a while leaving your ass cheeks moist. Cured with a Wipe Down
Oh man, my Poo Bum left a shit stain in my boxers.

Do you have a little Poo Bum Robby?
by butt master August 01, 2008

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