jerk

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Related to jerk around: out of commission

jerk

[jərk]
(mechanics)
The rate of change of acceleration; it is the third derivative of position with respect to time.
A unit of rate of change of acceleration, equal to 1 foot (30.48 centimeters) per second squared per second.
References in periodicals archive ?
I don''t jerk around with people who don''t have a chance - Tony has a chance.
Choreography is outstanding, especially when Nicholaw has his frenzied shirt-and-tie missionaries jerk around like '60s go-go dancers.
My heart drops back into place as I jerk around in exaspertation.