lo dice en serio

he/she is serious

→ lo
phrase Rare #40,197
he/she is serious Used to say that someone genuinely means what they are saying. With “no,” it means “he/she isn’t serious” or “he/she doesn’t mean it.”
SP: Cuando dice que va a renunciar, lo dice en serio.
EN: When he says he’s going to quit, he’s serious.

Ella lo dice en serio.

She means it.

Creo que lo dice en serio.

I think he means it.

Lo dice en serio, ¿sí?

He means it, right?

— Y tu mamá también (2001)

No lo dice en serio.

He doesn’t mean it.

— La asistenta (2025)

Lo dice en serio?

Are you serious?

— System crasher (2019)

Lo dice en serio.

He means it.