(as) conceited as a barber's cat American slang simile
Used to describe someone who is extremely vain or conceited
She becomes as conceited as a barber's cat because Rose has won the first prize in the Maths competition at school.
I don't want to talk to Mathew. He is always conceited as a barber's cat.
Acting and behaving like you are of great importance, but actually, you aren't
Conceited or overly proud
Used to refer to a sarcastic person
To be too proud of oneself or be in an arrogant manner
A conceited person, especially one in an insignificant job or role
This idiom was first recorded in the 19th century and early 20th century.