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A sexual act that begins with the female lying on the floor, naked with her legs spread facing the bed. The man, who is naked as well, stands on the bed. When both partners are ready, he jumps from the bed and slams his genitals against his partner's. This should cause instant, deep penetration. This move is dangerous and known to cause such injuries as ruptured testicals or ovaries and broken pelvises, so use it at your own risk.
Dude I tried the Rocky Mountain Slam on my gf and we both ended up in the hospital!
by Confucius of Murica January 21, 2015
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