twitchy

adj

1. susceptible to twitching a lot.

   “For the most part, however, his hunched, twitchy, wide-eyed take doesn’t seem like a believable portrait of social awkwardness so much as just a forced, awkward performance.”

2. (figuratively)irritable, cranky, nervous, anxious, worried

   “Johnson's contract expires in November, and four weeks as memorable for scandals off the pitch as any achievements on it will do little to appease the notoriously twitchy committee-men at the Rugby Football Union.”

   “Railways don't normally feature, but Conservative MPs are getting twitchy about this nationwide local issue.”