jitter >> ˈdʒɪtə
Definition: [noun] feelings of extreme nervousness.
Example: a bout of the jitters
Definition: [noun] slight irregular movement, variation, or unsteadiness, especially in an electrical signal or electronic device.
Example: picture jitter
Definition: [verb] act nervously.
Example: an anxious student who jittered at any provocation
Definition: [verb] (of a signal or device) suffer from jitter.
Example: the episode is only available as a jittering videotape version