twitchy

Etymology

twitch + -y

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. 2021-9-22, Caroline Siede, “Dear Evan Hansen is a misfire on just about every level”, in AV Club
2. (figurative) 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. 2011, Tom Fordyce, Rugby World Cup 2011: England 12-19 France
   Railways don't normally feature, but Conservative MPs are getting twitchy about this nationwide local issue. August 9 2023, Nigel Harris, “Comment: Disinterested and dishonest”, in RAIL, number 989, page 3