delusion of grandeur
- (usually in the plural) The false belief that one is important or powerful, accompanying certain mental disorders.
- (usually in the plural) Conceitedness or overconfidence.
2004, Tom Shone, Blockbuster: How Hollywood Learned to Stop Worrying and Love the Summer, page 285:
- [A]s Han Solo, always the voice of reason in the series, says, “I'm out of it for a little while, and everyone gets delusions of grandeur.”
False belief that one is important or powerful