jerk in WordNet English dictionary

1. jump vertically, with legs stiff and back arched
   "the yung filly bucked"
   buck  jerk  hitch 
   
2. throw or toss with a quick motion
   "flick a piece of paper across the table"; "jerk his head"
   jerk  flick 
   
3. make an uncontrolled, short, jerky motion
   "his face is twitching"
   twitch  jerk 
   
4. pull, or move with a sudden movement
   "He turned the handle and jerked the door open"
   yank  jerk 
   
5. move with abrupt, seemingly uncontrolled motions
   "The patient's legs were jerkings"
   jerk  twitch 
   

1. a dull stupid fatuous person
   jerk  dork 
   
2. an abrupt spasmodic movement
   jerk  jerking  jolt  saccade 
   
3. a sudden abrupt pull
   tug  jerk 
   
4. raising a weight from shoulder height to above the head by straightening the arms
   jerk 
   
5. meat (especially beef) cut in strips and dried in the sun
   jerky  jerked meat  jerk 
   
6. (mechanics) the rate of change of acceleration
   jerk