jump scare

/JH AH1 M P S K EH0 R/
noun
  1. 1

    (narratology) The technique, typically used in horror films and video games, of having something occur suddenly and without warning to frighten the audience.

  2. 2

    A fright caused by this.

  3. 3

    (humorous, by extension) The sudden arrival or advent of something unpleasant.

verb
  1. 1

    (transitive) To frighten (a film audience or video game player, etc.) by means of something that happens suddenly without warning.