[n] an abrupt spasmodic movement
[n] a sudden abrupt pull
[n] a dull stupid fatuous person
[n] (mechanics) the rate of change of velocity
[v] make an uncontrolled, short, jerky motion; "his face is twitching"
[v] throw or toss with a quick motion; "flick a piece of paper across the table"; "jerk his head"
[v] pull, or move with a sudden movement; "He turned the handle and jerked the door open.."
[v] jump vertically, with legs stiff and back arched, as of horses
[v] move with abrupt, seemingly uncontrolled motions; "The patient's legs were jerkings"
buck, dork, flick, flip, hitch, jerking, jolt, rate of acceleration, tug, twitch, twitch, yank