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The sexual act of defecating on one's partner. Particularly if the excrement is massive and remains undisturbed in it's cylindrical form. Origin: The act in itself is to populate your partner's chest with large hot steaming logs of poo, this is in direct correlation with the event of a wildfire in the sierra forest which would expectedly result in hot and steamy giant sequoias populated throughout.
Becky to Alicia: "Oh my god. I think tonight's the night that Bobby is going to give me my first Sierra Wildfire. I hope they're big."
by squatchnextdoor October 06, 2011
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