Old-fashioned equivalent to “cool” and “excellent”; jazz slang term that saw wide use in the 60s

Answer of Word Craze Old fashioned equivalent to cool and excellent jazz slang term that saw wide use in the 60s

This is a tricky question of Word Craze which last appeared on Level 503. Meanings or answers can change from time to time with each game update if you noticed a change on the answer of this clue please do let us know by commenting below so we can fix it A.S.A.P.
The solution below is:

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