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1.
Celebrated on February 14, as a substitute for Valentine's Day. Celebrated between all guys as an excuse to get free candy without getting awkward. An appropriate form of appreciation after receiving candy is a handshake-shoulderbump combo. Originating from a private middle school in Concord, MA.
Dude, I got ripped off by my Dudentine. He gave me one jolly rancher and I gave him a 12 pack of air heads.

Happy Dudentine's Day bro. (handshake-shoulderbump combo)
by Guava Hunter June 15, 2010