A foolish, rude, or contemptible person; a dull stupid fatuous person
- "That jerk called me names and stole my bike!"
- "He's a stupid jerk who doesn't know any better."
- A sudden abrupt motion, such as a yank or twist;
- a sudden reflexive or spasmodic muscular movement.
- "The repetitious jerk in his arm was beginning to really frustrate him."
- "The train started with a jerk."
move with abrupt, seemingly uncontrolled motions
- "The patient's legs were jerkings"