boogyman

/B UW1 JH IY0 M AE0 N/
noun
  1. 1

    A menacing, ghost-like monster in children's stories.

  2. 2

    (by extension) Any make-believe threat, especially one used to intimidate or distract.

Source: https://en.wiktionary.org/wiki/bogeyman, https://en.wiktionary.org/wiki/boogyman