Literally, 'bigger words'; words of greater force, weight, or importance.
2.
SpainLatin Americaneutralformal
Serious, consequential statements, proposals, or threats that require a substantial response or consideration; matters or language that go beyond casual talk and carry significant implications.
Examples:
ES: Y por la gente que nunca he llegado a ver. Son palabras mayores.
EN: Those are big words.
ES: Sé lo confortable que es acurrucarse con un libro lleno de palabras mayores y creer que se pueden solucionar los problemas del universo.
EN: I know how comfortable it is to curl up with a book full of big words and think you're going to solve the problems of the universe.
ES: - Enseguida palabras mayores.
EN: - Fighting words.
ES: Eso son palabras mayores.
EN: That's quite a sentence.
EN: You're picking very strong words.
ES: ¡Vaya! Eso son palabras mayores.
EN: Say, that's a pretty big word.
ES: Eso son palabras mayores, teniente.
EN: That's sure smart figuring', Lieutenant.
ES: Eso son palabras mayores, reverendo.
EN: Strong talk, minister.
ES: Esas son palabras mayores. Nosotros queremos limpiar la raza nórdica.
EN: Isn't that an unjust description of our efforts to keep the Nordic race pure?
ES: Son palabras mayores, y requieren respuestas concretas.
EN: Those are big words that call for precise answers.
ES: Esas son palabras mayores. Para pensar en ello, debería incluso estar sentado un rato.
EN: That's such an amount that I need to sit down to think about it.
ES: Eso son palabras mayores, tío.
EN: That's a very serious book, man.
ES: Me mordí el labio para no pasar a palabras mayores.
EN: I bit my lip so it didn't get really ugly.
ES: Dios mío, palabras mayores.
EN: My, heavy stuff.
ES: Esas son "palabras mayores".
EN: That is " big talk".
ES: - Eso son palabras mayores.
EN: - Dear lady, those are strong words.
ES: Esas son palabras mayores.
EN: - Hey, that's a big word you're using on me.
ES: Eso son palabras mayores, hijo.
EN: That's big game, son.
ES: No, alguna que otra chuleta o un lomo, pero esto son palabras mayores.
EN: No, the odd cutlet here, a haunch there. But this - this was a major payday. Do you know what you have done?