Englishjitters
plural noun
informal
a fit of opening-night jitters:
nervousness, nerves, fit of nerves, edginess, uneasiness, anxiety, anxiousness, tension, agitation, fretfulness, restlessness, fidgeting, trembling, shaking, jumpiness;
stage fright;
North American buck fever;
informal butterflies (in one's stomach), the willies, collywobbles, the heebie-jeebies, the shakes, the DTs, the jumps, the yips, jitteriness, the jim-jams, twitchiness;
British, informal the (screaming) abdabs;
Australian, rhyming slang Joe Blakes;
North American, archaic worriment.
▷antonyms calmness, serenity.
jitter Oxford Dictionary of English