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1.
An individual who is characterized by an inability, or strong reluctance, to have a bowel movement in any location outside the individual's home.
Why is Grandpa Phil in such a hurry to leave the dinner?

I think he's a Homeland Security Shitter - nature is calling after the turkey dinner but he won't go here so he's in a hurry to drive back to Montreal.
by O-Town Daddy October 04, 2013