twitchy

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.

irritable, cranky, nervous, anxious, worriedfiguratively

• 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.