A call to treat someone fairly and sensibly. Oh, be fair—let your brother ride in the front seat for a change.
See also: fair
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
ˌbe ˈfair!(spoken) used to tell somebody to be reasonable in their judgement of somebody/something: Be fair! She didn’t even know you were coming today.
Farlex Partner Idioms Dictionary © Farlex 2017