The Filipino Work Boot is a lewd act involving the act of ejaculating into a shoe, slipper, or otherwise foot holding device. It is extremely hilarious, and should be performed at least three times a week for good measure.
Martial arts' kicking expertise, usually used in reference to performers in Hong Kong martial arts films. A fine use of legs and kicking (as opposed to flips, punches, wire-fu etc) is called bootwork. Usually this occurs when the performer is actually trained in kickboxing or taekwondo rather than wushu or Peking Opera.