greatest, the adj.
(US) excellent, fantastic, a general term of approval.
|Jazzways 56: ‘Duke’s the greatest’ is certainly the easiest cliché tossed around in swing circles.|
|Esquire Nov. 131: Jazz musicians and enthusiasts thrive on hyperbole, of course; if anything is good, it is ‘the greatest’.|
|Burn, Killer, Burn! 336: Take me in your arms and kiss me. That would be the greatest!|
|Sweet Ride 98: ‘Was it that good?’ ‘The greatest. You should have been there.’.|
|Barry McKenzie [comic strip] in Complete Barry McKenzie (1988) 120: Why sir, this tour is just the greatest.|