Spanish phrase
Prefiero que no.
Meaning
I'd rather not.
When to use it
A polite way to decline or ask someone not to do something. Used to turn down invitations or gently request someone to stop, soft and indirect in casual or semi-formal settings.
Example dialogue
¿Quieres venir a la fiesta conmigo esta noche?
Do you want to come to the party with me tonight?
Prefiero que no, tengo examen mañana.
I'd rather not. I have an exam tomorrow.