The Oxford Thesaurus An A-Z Dictionary of Synonyms - way-out adj.

1) bizarre, mad, weird, crazy, strange, odd, peculiar, freakish, freaky, eccentric, queer, abnormal, offbeat, outrageous, wild, exotic, esoteric, Colloq kinky, Slang kooky, off-the-wall, far-out, screwy, nutty, US flaky, screwball: The police did not take kindly to the boys' way-out behaviour after the party. 2) avant-garde, advanced, original, innovative, unorthodox, unconventional, experimental, precedent-setting, progressive, exploratory, ground-breaking, Slang far-out: Spencer thinks that the way-out art of the 1960s will have great value one day.