Top Definition
When you see a sex position so freaking amazing and unknown, you call it the Reverse Shamwow until you either find out its real name, or until it is named something else.
Evan: "While me and Hannah were having sex last night, we did the Reverse Shamwow! I don't even know how to describe it, it was that exotic."

Ian: "Lucky!"
by WISH KVFU January 10, 2011

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