you, etc. can't have it both ways
can't have it both ways
Cannot have two contradictory things at once. I know you love ice cream, but you can't eat it every day and lose weight—you just can't have it both ways.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
you, etc. can’t have it ˈboth waysyou must choose between two things even though you would like both of them: You want an interesting job that pays well, and yet one where you don’t have many responsibilities. Well, you can’t have it both ways.
Farlex Partner Idioms Dictionary © Farlex 2017