spoiler alert

US /ˈspɔɪ.lər əˌlɜːrt/
UK /ˈspɔɪ.lər əˌlɜːrt/
"spoiler alert" picture
1.

alerte spoiler, attention spoiler

a warning that a forthcoming summary of a film, TV program, book, etc., will reveal details of the plot

:
Spoiler alert: The main character dies at the end of the movie.
Alerte spoiler : Le personnage principal meurt à la fin du film.
Before I tell you about the book, spoiler alert, it has a surprising twist.
Avant de vous parler du livre, alerte spoiler, il y a un rebondissement surprenant.
1.

alerte spoiler, avertissement de spoiler

a warning that a forthcoming summary of a film, TV program, book, etc., will reveal details of the plot

:
The article began with a clear spoiler alert.
L'article a commencé par une alerte spoiler claire.
Always include a spoiler alert when discussing new movie plots.
Incluez toujours une alerte spoiler lorsque vous discutez de nouvelles intrigues de films.