destripar

Literally to gut or disembowel — destripar un pescado, un pollo. Figuratively, and just as commonly, it means to spoil a story, joke, or plot twist by giving away the ending before someone else can experience it: destripar el final de una película. The noun destripe is Fundéu's recommended Spanish alternative to the English 'spoiler,' a sense that's actually been in the RAE dictionary since 1884.

• El pescadero destripó el pescado antes de venderlo. — The fishmonger gutted the fish before selling it.
• ¡No me destripes el final de la serie! — Don't spoil the ending of the show for me!
• Alguien destripó el misterio en los primeros minutos de la película. — Someone gave away the mystery in the first few minutes of the movie.

Only learning the literal 'gut/disembowel' sense — in everyday conversation about books, shows, and movies, destripar overwhelmingly means 'to spoil,' not anything gruesome.

• expression Destripe — Fundéu (the Fundación del Español Urgente) recommends destripe as the natural Spanish alternative to the English loanword 'spoiler' — and the underlying sense of destripar ('to give away an ending prematurely') has actually been documented in the RAE dictionary since 1884, predating the English term by well over a century.