Spanish phrase
¿Te parece mal si ~?
Meaning
Do you mind if I ___?
When to use it
Checks whether an action is acceptable to the listener. Casual to neutral tone for asking permission; can sound informal depending on context.
Example dialogue
¿Te parece mal si uso tu móvil un momento?
Do you mind if I use your phone for a moment?
Prefiero que no, gracias.
I'd rather you didn't, thanks.