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A Jamestown porridge is the act of vomiting into a womans ass, adding kraft dinner mix, inserting your penis and jizzing profusesly. The sloppy contents of this anal soup should have an anema effect, causing her to shit uncontrollably. You and your damsel then invite some of your friends over, for a nice steamy lunch.
"Mmm, lawdy. I sure could go for some Jamestown porridge right about now you guise."

"Jamestown porridge again!?! but MOOOOOOOOM.."
by TheBigfilthy April 29, 2009
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