Open English Wordnet
Nouns
(n)jerk, dorka dull stupid fatuous person (n)jerk(mechanics) the rate of change of acceleration (n)jerkraising a weight from shoulder height to above the head by straightening the arms Verbs
(v)yank, jerkpull, or move with a sudden movement“He turned the handle and jerked the door open” (v)jerk, twitchmove with abrupt, seemingly uncontrolled motions“The patient's legs were jerking” (v)twitch, jerkmake an uncontrolled, short, jerky motion“his face is twitching” (v)buck, jerk, hitchjump vertically, with legs stiff and back arched“the young filly bucked” (v)jerk, flickthrow or toss with a quick motion“flick a piece of paper across the table”,
“jerk his head”