Fancy pants American adjective informal
The phrase is often used to indicate the speaker's annoyance.
Fancy in a pretentious way
He celebrated his graduation at a fancy-pants restaurant.
She keeps going out with those fancy-pants despite her mother’s objection.
Used to descibe someone or something fancy or colorful
Said when someone believes in unrealistic or fanciful ideas that is impossible to happen
Make someone or something fancier, more exciting or interesting
Used to describe having a mistaken belief.
Used to describe that you want something very much and you would do anything to have it.
The first reference to the term in print is in an advert in the Maine newspaper The Bangor Daily Whig And Courier, in October 1843.