false start

/F AO1 L S T AA0 R T/
noun
  1. 1

    The act of an athlete starting a race before being signaled to do so.

  2. 2

    The act of an offensive player moving across the line of scrimmage prior to the snap.

  3. 3

    An attempt at something that does not work, requiring one to start over.

Source: https://en.wiktionary.org/wiki/false%20start