jit·ter

[jit-er]
noun
1.
jitters, nervousness; a feeling of fright or uneasiness (usually preceded by the ): Every time I have to make a speech, I get the jitters.
2.
fluctuations in the image on a television screen or in copy received by facsimile transmission, caused by interference or by momentary failures of synchronization.
verb (used without object)
3.
to behave nervously.

Origin:
1920–25; variant of chitter to shiver (Middle English chiteren), gradational variant of chatter

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World English Dictionary
jitter (ˈdʒɪtə) [Click for IPA pronunciation guide]
 
vb
1.  (intr) to be anxious or nervous
 
n
2.  the jitters nervousness and anxiety
3.  electronics small rapid variations in the amplitude or timing of a waveform arising from fluctuations in the voltage supply, mechanical vibrations, etc
 
[C20: of unknown origin]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Cite This Source
00:10
Jitters is always a great word to know.
So is slumgullion. Does it mean:
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
a stew of meat, vegetables, potatoes, etc.
Example sentences
Uncertainty about whether the rest of the loan will be disbursed is causing
  jitters.
He also kept using people's real names, giving the others serious jitters.
In fact he did enliven the semester, but a strange thing happened along the
  way: there was a tremendous outbreak of the jitters.
Although it was billed as a nonviolent protest, everybody had the jitters.
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