don't get involved
Don't mess with me.
Mira, no te metas demasiado en esto.
Look, don't get too involved in this.
— El club de la lucha (1999)
No te metas en medio de un marido y su mujer.
Don't interfere between a husband and his wife.
No te metas el cuchillo en la boca.
Don't put the knife in your mouth.