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1.
(noun) The act of rubbing your hands near a woman's crotch as if you were to warm your hands in front of a fireplace. This act is best performed when the woman is unaware and others are there to witness, for it is more comedic in that fashion.
"I was fireplacing this chick and my hands were so warm, for a minute I imagined I was camping."

past tense (fireplaced):

"There was this girl sitting on a park bench on Capitol Hill and I totally fireplaced her."
by BorachMan September 12, 2011