fliest

adjective

superlative form of fly; most stylish, fashionable, or impressive in appearance or manner

Usage: informal; slang; chiefly North American

Examples

That's the fliest outfit I've seen all week.
He showed up in the fliest car on the block.
She's got the fliest sneakers in the whole school.
That was the fliest dance move at the party.
He always wears the fliest clothes to impress his friends.