Wiktionary
JITTER, noun. A nervous action; a tic.
JITTER, noun. (chiefly in the plural) (often with "the") A state of nervousness.
JITTER, noun. (telecommunications) An abrupt and unwanted variation of one or more signal characteristics.
JITTER, verb. (intransitive) To be nervous.
JITTER, noun. (computing) A program or routine that performs jitting.
Dictionary definition
JITTER, noun. Small rapid variations in a waveform resulting from fluctuations in the voltage supply or mechanical vibrations or other sources.
JITTER, noun. A small irregular movement.
Wise words
It is better wither to be silent, or to say things of more
value than silence. Sooner throw a pearl at hazard than an
idle or useless word; and do not say a little in many words,
but a great deal in a few.