english
1
general::
Open and honest, as in Dad has always been on the up-and-up with them. The precise allusion in this term is unknown. [Colloquial; c. 1860]
American Heritage Idioms
2
general::
Phrase(s): (strictly) on the up-and-up honest; fair and straight. • Do you think that the mayor is on the up-and-up? • Yes, the mayor is strictly on the up-and-up.
McGrawhill's American Idioms And Phrasal Verbs
3
general::
Phrase(s): on the up-and-up legitimate; open and aboveboard. • Is this deal on the up-and-up? What’s the catch? • Everything I do is on the up-and-up. I am totally honest.
McGrawhill's American Idioms And Phrasal Verbs