jerk

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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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
She chastises herself for mentally recording images of another dancer for her "private jerk off picture file":
I'd rather jerk off. No, it's no good, it's too direct."
The email read: "Kinda sick knowing you jerk off to your wild imagination....
The point of this unique interlude is to illustrate a commercial niche unfilled as of 1997: "something to jerk off to over the Internet." This need is willingly met by two slime-buckets with an infinite lack of principles, Wayne Beering (Giovanni Ribisi) and Buck Dolby (Gabriel Macht).