Wiktionary
scissor kick
n. 1 (context soccer English) A bicycle kick. 2 (context swimming English) A leg movement in which the legs are separated and brought together with a snap. 3 (context vulgar English) An act of tribadism.
Wikipedia
Scissor kick (martial arts)
A scissor kick in martial arts is used to describe certain kicking or grabbing techniques that resemble a pair of scissors.