far out (?.)

• Bohemian
• a la mode
• advanced
• at the height
• at the limit
• avant-garde
• beat
• breakaway
• contemporary
• extreme
• fashionable
• forward-looking
• free and easy
• fringy
• furthest
• greatest
• heretical
• heterodox
• hippie
• in
• informal
• kinky
• maverick
• mod
• modern
• modernistic
• modernized
• modish
• most
• newfashioned
• not cricket
• not done
• not kosher
• now
• offbeat
• original
• present-day
• present-time
• progressive
• radical
• streamlined
• too much
• twentieth-century
• ultra
• ultra-ultra
• ultramodern
• unconventional
• unfashionable
• unorthodox
• up-to-date
• up-to-datish
• up-to-the-minute
• utmost
• uttermost
• way out