bo-peep

/B OW1 P IY0 P/
noun
  1. 1

    The act of looking out suddenly, as from behind a screen, so as to startle someone (as by children in play), or of looking out and drawing suddenly back, as if frightened.

  2. 2

    (British Virgin Islands) Any whistling frog.

verb
  1. 1

    To play the game of bo-peep; to peek out suddenly.

Source: https://en.wiktionary.org/wiki/bo-peep