the.com/jittery
the body running on fear's fuel with nowhere left to drive.
means Nervous and unsteady, twitching with anxious energy you can't quite hold still.
from From 'jitter,' which surfaced in early 20th-century American slang for nervous twitching — also giving us 'the jitters.' Its deeper roots are murky, but it likely belongs to the family of fidgety little words like 'jiggle,' 'jitter,' and 'jolt,' whose very sounds seem to shiver. The suffix '-y' simply turns the shaking into a description: full of jitters.
caffeine linkCoffee jitters peak around 30 minutes after sipping.
adrenalineFight-or-flight floods muscles whether you flee or sit still.
blood sugarLow glucose can mimic anxiety with shakes and dread.
physics termEngineers call random signal noise the same word.
micro-tremorEveryone has a tiny constant hand tremor, always.