(as) conceited as a barber's cat
Very narcissistic or vain. Don't invite Joe to lunch unless you want to hear him brag about all the important things he's doing in his new job. He's just as conceited as a barber's cat lately.
*conceited as a barber's cat
Rur. very conceited; vain. (*Also: as ~.) Ever since he won that award, he's been as conceited as a barber's cat.