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1.
the kinky act of involving pinecones in your sexual foreplay or in the sexual act
Would you like to join me in pineconing tonight?
by fishyBusiness69 June 03, 2011
 
2.
Inserting a pinecone into the rectum.
Dude, I'm totally Pineconing that chic tonight.
by squid33 December 02, 2010