play fair

Idioms  

1. Behave honestly and honorably, obey the rules, as in Not every supplier we deal with plays fair, or We can't just leave them to find their own way back—that's not playing fair. Although this idiom conjures up playing by the rules in some game or sport, it actually has been used in this figurative way since the mid-1400s. Also see play the game.

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Example Sentences

In America, there’s a sense that too much success in business is a bad thing, and that everyone needs to play fair.

From Barron's • May 2, 2026

Do McLaren have to face the truth of F1 now - that if you want to win, you can't always play fair?

From BBC • Oct. 21, 2025

Her father’s second-in-command, the handsome Jack Dean, insists family members play fair in obeying their father’s will.

From Los Angeles Times • May 27, 2025

“Things like that just don’t play fair in our mind.”

From Seattle Times • Oct. 4, 2023

They shook hands and promised to play fair.

From "The Missing Mitt (The Hardy Boys: Secret Files, #2)" by Franklin W. Dixon

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