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1.
A sex move related to the Norwegian Hammer, in which a participant waits at the bottom of a snow-covered hill which features a ramp, and drops their pants. A second participant equips themself with skis and proceeds to the top of the hill. This participant then skis down the hill, and makes a ski jump over the ramp. They must then attempt to penetrate the other participant before making contact with the floor. If they fail in this attempt they are not American.

A variant using a snowboard is known as the 'American Sledgehammer'and requires even greater dexterity
I pulled an american hammer on your sister last night. It was awesome.
by Jimi123 September 08, 2008