A sexual position, modified from the conventional "sledgehammer."
A man will throw the woman's legs over his shoulders, and roll her backwards onto her shoulders so that he is thrusting down with his body perpendicular to the woman's and parallel with the ground.
The balance required for such a feat, combined with the transcendant relaxation state experienced by the woman, is reminiscent of that of a Tibetan Monk.
Man, I just gave my girl the old Tibetan Sledgehammer! Totally on that higher plane bro, so Zen.