Spanish phrase
No me mientas.
Meaning
Don't lie to me.
When to use it
A demand that someone stop lying. Used to confront suspected dishonesty in close relationships and can sound confrontational depending on tone.
Example dialogue
No me mientas, ¿estuviste con Marta anoche?
Don't lie to me. Were you with Marta last night?
No, no estuve, me quedé en casa.
No, I wasn't. I stayed home.