How to Sign "Knockout"
To sign *knockout*, start by bringing your dominant hand up near your cheek. Keep your hand flat with your fingers together, and your palm facing your face. Next, move your hand sharply across your face to the opposite side, mimicking a strong slap or physical blow. As your hand moves across, spread your fingers open into a '5' handshape. To make the sign look natural, slightly turn your head in the same direction as your hand to emphasize the impact of the blow.