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1.) To cut someone's legs out from under them at the knees, usually with a bladed weapon (e.g. knives, swords).

2.) Clotheslined at the knees.

1.) I was doing just fine until he kneecapitated me, and I couldn't move.

2.) I didn't see that rope, and it kneecapitated me into the ground.
by Aethreal August 24, 2008
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