(as) proud as Lucifer
US /əz praʊd əz ˈluːsɪfər/
UK /əz praʊd əz ˈluːsɪfər/
1.
extremely proud or arrogant
:
•
He was (as) proud as Lucifer after winning the championship.
•
Her attitude was (as) proud as Lucifer, making her difficult to approach.