Definition of "jitter"

But Bolton deserve real credit, seeking to take advantage of their jitters at every opportunity in typically determined fashion.

2010 December 29, Chris Whyatt, “Chelsea 1 - 0 Bolton”, in BBC‎

It is a sunny morning in Amman and the three uniformed judges in Jordan’s state security court are briskly working their way through a pile of slim grey folders on the bench before them. Each details the charges against 25 or so defendants accused of supporting the fighters of the Islamic State (Isis), now rampaging across Syria and Iraq under their sinister black banners and sending nervous jitters across the Arab world.

2014 November 27, Ian Black, “Courts kept busy as Jordan works to crush support for Isis”, in The Guardian

Interviewer: How do you feel coming back here? What is constantly evoked in you when you see your center again back in Little Rock?Clinton: Well first of all if I don't come back about once a month I start to get the jitters.

2022 May 5, Bill Clinton, 0:00 from the start, in Bill Clinton talks Arkansas politics & Ukraine Full interview‎, THV11, archived from the original on 05 May 2022

Now you have mirror-clear TV without picture flopover, jitter, tear!

1956, LIFE, volume 41, number 11, page 41