be (as) right as rain
US /bi əz raɪt əz reɪn/
UK /bi əz raɪt əz reɪn/

1.
estar ótimo, estar como novo
to be completely well or healthy again after an illness or injury
:
•
After a good night's sleep, I'll be as right as rain.
Depois de uma boa noite de sono, estarei ótimo.
•
The doctor said he'd be as right as rain in a few days.
O médico disse que ele estaria ótimo em alguns dias.