give (oneself) airs

To think or behave as though one is superior to others or better than one really is; to have or assume a pretentious or self-aggrandizing attitude. I think John is really a decent fellow at heart, but I really wish he wouldn't give himself such airs about his writing abilities. Stop giving yourself airs, Mary, you're not some world-class actor—you're just an amateur like the rest of us!

Common Names:

Name	Pronounced	Usage
Gwenneth	-	Welsh (Rare)
GunnbjÖRg	-	Ancient Scandinavian
Theophilus	thee-AHF-ə-ləs (English)	Biblical, Ancient Greek (Latinized)
Gemma	['dʒemə]
Emmy	EM-ee (English)	English, Dutch
Melvin	['melvin]