If something, especially a part of your body, twitches or if you twitch it, it makes a little jumping movement. When I stood up to her, her right cheek would begin to twitch Stern twitched his shoulders. Twitch is also a noun. He developed a nervous twitch and began to blink constantly
a sudden muscle spasm; especially one caused by a nervous condition make an uncontrolled, short, jerky motion; "his face is twitching" move or pull with a sudden motion
By twisting the stick the compression is made sufficiently painful to keep the animal quiet during a slight surgical operation
very small body movement such as a local foot or finger jerk which is not usually associated with an arousal
A short, spastic contraction of the fibers or muscles; a simple muscular contraction; as, convulsive twitches; a twitch in the side