Sometimes my leg will ____, or give an involuntary kick.

verb

1. To move jerkily quiver
2. To undergo a brief spasmodic muscular contraction

   "his hand twitched"

3. Pull, pluck

   "twitched at my sleeve"

4. To move or pull with a sudden motion jerk

noun

1. A brief spasmodic contraction of the muscle fibers
2. A slight jerk of a body part
3. An act of twitching
4. A physical or mental pang

   "a twitch of remorse"

5. A loop of rope or strap that is tightened over a horse's lip as a restraining device

noun

1. Quack grass

noun

1. A European grass (Elymus repens synonym Agropyron repens) that is naturalized throughout North America and spreads by creeping rhizomes

adjective

1. Of, relating to, or being muscle fiber that contracts quickly especially during brief high-intensity physical activity requiring strength compare slow-twitch

adjective

1. Of, relating to, or being muscle fiber that contracts slowly especially during sustained physical activity requiring endurance compare fast-twitch