Jerk

1. Change in acceleration. Third derivative of a point (x,y) in a function.

2. One who acts in a manner that indicates believed superiority of all those around, esp. in an aggressive or hurtful manner. Usually associated with men, however, can be used to describe women too.

1. You feel jerk as you go from slowly accelerating in your car to accelerating at a higher rate. (note. acceleration is not velocity, it is rate of change of velocity)

2. That jerk just called me a jerk...

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