fliest

/ˈflaɪɪst/
adjective
  1. Superlative form of 'fly' (slang): the most stylish, cool, or fashionable.
    • He wore the fliest sneakers I've ever seen to the party.
    • That new car is the fliest ride in the neighborhood.
    • She thinks her outfit is the fliest, and honestly, she's right.