stuffed shirt
US /stʌft ʃɜrt/
UK /stʌft ʃɜrt/
1.
a pompous, formal, and often self-important person
:
•
He's such a stuffed shirt, always talking down to everyone.
•
The new manager is a bit of a stuffed shirt, very rigid and formal.
a pompous, formal, and often self-important person