noun
fop
FAHP/fɑːp/
A vain man excessively concerned with his clothes and manners.
The fop fusses over the exact angle of his pocket square.

Etymology
Fop first meant a foolish person, later narrowing to a man conspicuously concerned with dress and appearance. This later use may have begun as mockery by people who considered such concerns foolish.
In context
let him avoid going to the extreme of the mode if he would not be taken for an empty-headed FOP
More examples
- The play mocked a fashionable fop.
- He was dismissed as a fop who cared only about clothes.
- The fop admired himself in every mirror.
Forms
fop · fops