'Face' is not a recognized slang term in Spanish. However, when translated directly, 'face' means 'cara'. In certain contexts, it could be used metaphorically to refer to someone's audacity or nerve.
Examples
- Spanish: No puedo creer la cara de ese tipo, actuando como si no hubiera hecho nada malo.
- English: I can't believe the nerve of that guy, acting as if he hasn't done anything wrong.