definition of
jerk

[1] #1 jerk v. [yank] pull, or move with a sudden movement; "He turned the handle and jerked the door open". wn

[2] #2 jerk v. [twitch] move with abrupt, seemingly uncontrolled motions; "The patient's legs were jerkings". wn

[3] #3 jerk n. [dork] a dull stupid fatuous person. wn

[4] #4 jerk v. [twitch] make an uncontrolled, short, jerky motion; "his face is twitching". wn

[5] #5 jerk n. [jerking, jolt, saccade] an abrupt spasmodic movement. wn