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 Englishchiteren), gradational variant of chatter
electronics small rapid variations in the amplitude or timing of a waveform arising from fluctuations in the voltage supply, mechanical vibrations, etc