booby-trap

/B UW1 B IY0 T R AE1 P/
noun
  1. 1

    An antipersonnel device deliberately hidden or disguised as a harmless object.

  2. 2

    A practical joke by which something is made to fall upon someone entering through a door, or the like.

  3. 3

    (by extension) An unforeseen source of danger; a pitfall.

verb
  1. 1

    To set up with booby traps; to plant a booby trap on.

Source: https://en.wiktionary.org/wiki/booby%20trap, https://en.wiktionary.org/wiki/booby-trap