Synonyms and related words :
acerb, acerbate, acerbic, acescent, breath, coup, crab, crabbed, crack, dry, flash, green, half a jiffy, half a mo, half a second, half a shake, instant, jiff, jiffy, microsecond, millisecond, minute, moment, pickled, pungent, second, shake, sour, sour as vinegar, soured, sourish, split second, stroke, tart, tartish, tick, trice, twink, twinkle, twinkling, twitch, two shakes, unripe, unsweet, unsweetened, vinegarish, vinegary, wink