[jit.ter] n [origin unknown] (1929) 1 pl: a sense of panic or extreme nervousness "had a bad case of the ~s before his performance"
2: the state of mind or the movement of one that jitters
3: irregular random movement (as of a pointer or an image on a television screen); also: vibratory motion
[2]jitter vi (1931) 1: to be nervous or act in a nervous way
2: to make continuous fast repetitive movements