The term 'hand cuff' is a type of restraint used to limit the movement of a person's hands. The crossword solutions for this term are 'SLAP' (4 letters) and 'karatechop' (10 letters). SLAP is a physical gesture in which one person strikes another with an open hand, usually as a form of punishment or reprimand. Karatechop is a martial arts technique in which a person strikes an opponent with the side of their hand. Both of these techniques can be used to restrain someone's hands and thus can be considered as forms of handcuffing.