>>314749215An option select. A single input (or sequence of input) that, depending on the situation, can lead to a variety of moves coming out. A well known one in SF4 is mashing the throw input (LP+LK) while the opponent is jab pressuring you. The idea is that doing the input while blocking keeps you blocking, but the moment your opponents tries to do a throw attempt, you will either jab them out of it or tech the throw.