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1.
Short version of I pray thee; to ask for something in a polite manner.
I prithee bring them hence! (pancakes)
by rothantik September 28, 2009
 
2.
An archaic word for vegetable shortening.
Whither in hell's name doth be mine Crisco? The goddamn recipe calls for prithee.
by What the hell man? May 16, 2010