split second

from WordNet (r) 3.0 (2006)

split second
    n 1: a very short time (as the time it takes the eye to blink or
         the heart to beat); "if I had the chance I'd do it in a
         flash" [syn: {blink of an eye}, {flash}, {heartbeat},
         {instant}, {jiffy}, {split second}, {trice}, {twinkling},
         {wink}, {New York minute}]

from Moby Thesaurus II by Grady Ward, 1.0

28 Moby Thesaurus words for "split second":
      breath, breathing, coup, crack, flash, half a jiffy, half a mo,
      half a second, half a shake, instant, jiff, jiffy, microsecond,
      millisecond, minute, moment, sec, second, shake, stroke, tick,
      trice, twink, twinkle, twinkling, twitch, two shakes, wink

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