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The act of eating a greasy food item out of a female's vagina and proceeding to use the grease as lubrication for intercourse.
Jay: I'm feeling in the mood for some Greasy Poon tonight...

Cat: I'll pick up a double cheeseburger on my way home!

or

Jay: We may need lube I'll stop and get some on my way over.

Cat: No need I'm cooking burgers, we can just do a Greasy Poon!
by BuggyBottles September 16, 2013
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