deal-breaker
noun /ˈdiːl breɪkə(r)/
/ˈdiːl breɪkər/
- something that causes somebody to reject a deal in politics or business
- The candidate's support for the war is the deal-breaker (= people will not vote for the candidate because of it).
- I would have bought the house, but the small backyard was the deal-breaker for me.