spoiler (spoilers plural )
1 n-count If you describe someone or something as a spoiler, you mean that they try to spoil the performance of other people or things.
I was a talentless spoiler. If I couldn't be good, why should they?...
2 n-count A spoiler is an object which forms part of an aircraft's wings or part of the body of a car. It changes the flow of air around the vehicle, allowing an aircraft to change direction or making a car's forward movement more efficient.