divulgâcher

A Québécois coinage (divulguer + gâcher) for "to spoil" the ending of a book, film, or show — proposed by the Office québécois de la langue française in 2014 as a French alternative to the anglicism "spoiler," and later picked up by the Larousse dictionary, though it remains a secondary regionalism in France itself.

• Ne divulgâche pas la fin du film, s'il te plaît ! — Don't spoil the film's ending, please!
• Cet article divulgâche toute l'intrigue. — This article gives away the whole plot.
• Attention, la bande-annonce divulgâche un peu trop. — Careful, the trailer spoils a bit too much.

This word is standard in Québec but still sounds regional or self-consciously purist to speakers in France, where "spoiler" (as a loaned verb) remains far more common in casual speech.