This phrase is not used as a slang term in Spanish. The literal translation is 'pepper in the salt shaker'. It can be used metaphorically to refer to a confusing or mixed-up situation.
Examples
- Spanish: ¡Vaya, has puesto la pimienta en el salero! Ahora todo está al revés.
- English: Oh, you have put the pepper in the salt shaker! Now everything is upside down.