Definition from Wiktionary, the free dictionary
Alternative forms 
bogeyman (plural bogeymen)
- A menacing, ghost-like monster in children's stories.
- (by extension) Any make-believe threat, especially one used to intimidate or distract.
- The alleged link between Saddam Hussein and al-Qaeda turned out to be a bogeyman.
menacing, ghost-like monster in children's stories
any make-believe threat