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When the sex-appeal, "groove", or mojo of two individuals or parties become intertwined causing some sort of an unpredictable and/or explosive result.

From "Austin Powers: International Man of Mystery".
Austin Powers: Wait Vanessa, I can explain. You see, I was looking for Dr. Evil when the Fembots came out and smoke started coming out of their jomblies. So I started to work my mojo, to counter their mojo; we got cross-mojulation, and their heads started exploding.
by Adrienne Wall November 09, 2007
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