(n.) One who trembles.

apoplexy be cold bob bobble bounce breakup bump cataclysm chatter chill climax convulsion diastrophism didder disaster dither earthquake falter fidget fit flip out fluctuate flutter freak out on freeze freeze to death get high on glow go pitapat grimace grow cold have a chill have an ague have goose pimples have the fidgets have the shakes heave horripilate hustle jactitate jar jerk jig jigget jiggle jog joggle jolt jostle jounce jump lose heat overthrow palpitate pant paroxysm perish with cold quaker quaver quiver rictus shake shake all over shiver shock shudder spasm squirm stagger stroke swell swell with emotion temblor thrill thrill to throb tic tidal wave tingle tingle with excitement toss toss and turn tremble trembler tremblor tremor tsunami tumble turn on to twist and turn twitch twitter upheaval vibrate waver wiggle wobble wriggle writhe