A "sex kick" is an aerial attack in which a foot or arm remains extended for a few moments after the initial thrust. The term was coined by smasher Matt Deezie as a sexual innuendo referring to the properties of the attack in the original Super Smash Bros. A visual sex kick consists of the thrust (kicking motion) and the extension (leg remaining out), with the other leg bent and the foot tucked beneath the kicking leg's thigh. Sex kick mechanics in more recent games include attacks that do not resemble kicks, and are no longer exclusive to aerials.
Properties of sex kicks include:
Sex kicks are almost always a neutral aerial, and the term classically refers only to neutral aerials. However, some characters wield other attacks — most commonly back aerial — that exhibit similar properties, and smashers often refer to them as sex kicks.
Notable sex kicks
List of sex kicks
Most characters in SSB have one sex kick: their neutral aerial. The two exceptions are Donkey Kong, whose sex kick is his back aerial, and Fox, whose neutral and back aerial are both sex kicks, making Fox the only character with two sex kicks.