Idiom: 'On the up and up'


Could you please tell me if the idiom ‘on the up and up’ means differently in BrE and AmE? Would we agree if I said:

BrE: healthy, financially strong.
AmE: honest, legal


So it seems, Tom. According to the dictionaries I consulted:

on the up and up
, Informal. frank; honest; sincere: He seems to be on the up and up. Also, on the up-and-up.

on the up and up MAINLY US INFORMAL
describes someone who is honest and can be trusted

on the up and up UK
continually improving:
Her career has been on the up and up since she moved into sales.

Hi Tom

Yes, “on the up and up” means honest and trustworthy/respectable in the US.