You can't have your cake and eat it
PROVERB
Have your cake and eat it too; Have their cake and eat it too; Have his cake and eat it too; Have one's cake, and eat it too; Having your cake and eating it too; You cant have your cake; You can't have your cake and eat it too; Eat one's cake and have it too; Have one's cake and eat it; Have one's cake and eat it, too; Have one's cake & eat it too; You can't both have your cake and eat it; You can't both have your cake and eat it.; Have one's cake and eat it too; Having one's cake and eating it too; Having one's cake and eating it; Cakeism
You can't have your cake and eat it (too) is a popular English idiomatic proverb or figure of speech. The proverb literally means "you cannot simultaneously retain possession of a cake and eat it, too".