on the up-and-up

1. 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]

Related Words

• candid 
• civil 
• clean 
• courteous 
• decent 
• equal 
• equitable 
• generous 
• good 
• honest 
• honorable 
• impartial 
• lawful 
• legitimate 
• neutral 
• objective 
• principled 
• proper 
• reasonable 
• sincere