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1.
An insanely delicious pie made of apples, peaches, cherries, raisins, and other tart fruits. It is the best pie ever made, with the exception perhaps of pumpkin pie. Typically served with egg-nog at Thanksgiving and Christmas celebrations.
"Oh man, I just ate five slices of mincemeat pie."
"Yeah, well, go eat more, son."
by Phaedrus Raen November 26, 2005
 
2.
When you are eating out a pussy so nasty you throw up into said pussy. That is a mincemeat pie.
Sarah hadn't showered in a week, I couldn't help it; I gave her a mincemeat pie
by dabadabadooee July 22, 2006