the.com/conceited
When someone's mirror tells them what they desperately need to hear.
means Excessively proud of oneself, especially of one's appearance, talent, or all-around magnificence.
from From the older sense of conceit meaning an idea or notion you've formed in your mind — eventually, the notion you formed was just how great you are.
Old meaningOnce simply meant a clever thought or fanciful idea.
Literary cousinA poetic conceit is an elaborate extended metaphor.
Sneaky negationSelf-conceited is the same thing, only louder.