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лучше некуда stresses
gen.	to the last degree (Franka_LV); doesn't get better than that (yerlan.n)
amer.	never been better (Val_Ships); on another level (chiefcanelo)
idiom.	the cream of the crop (Shabe)
ironic.	excellent (suburbian)
Makarov.	there is no room for improvement

лучше некуда: 1 phrase in 1 subject

Ironical

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