booby trap

 

noun

  • 1an apparently harmless object containing a concealed explosive device designed to detonate when someone touches it.
  • 2a trap intended as a practical joke, especially one involving an object placed on top of a door ajar ready to fall on a person passing through.

verb

  • (booby-trap) [with object] place a booby trap in or on (an object or area): (as adjective booby-trapped) a booby-trapped parcel