The motion, and sound of one's balls swaying back and forth, and slapping a male's thighs when he is running up or down stairs with loose fitting shorts on.
NOTE : Not to be confused with Oh-my-god-that's-sicktapsis, which is when Meat Curtains hit thigh.
NOTE : Not to be confused with Oh-my-god-that's-sicktapsis, which is when Meat Curtains hit thigh.
by Bzur December 21, 2009
Get the Demotapsismug.