Other forms: swankiest; swankier; swankily
Swanky things are fancy and stylish, like a swanky hotel lobby with sparkling chandeliers, plush furniture, and elegant guests.
You can also call swanky things ritzy or classy. They're expensive and luxurious, like a swanky car, a swanky apartment building with a doorman, or a swanky neighborhood where only movie stars can afford to live. The adjective swanky comes from its less-common synonym swank, which stems from the now-obsolete verb swank, "to behave ostentatiously."