Learn these spanish idioms with ojo (eye), boca (mouth), oreja (ear), pelo (hair) to sound more like a native speaker.

Spanish idioms with ojo (eye), boca (mouth), oreja (ear), pelo (hair)

What you don’t know won’t hurt you. (literally: eyes that don‘t see, heart that doesn’t feel). 
For example:
– Se ha roto la taza favorita de mi hermana.
– Pues no se lo digas. Ojos que no ven, corazón que no siente.

Roughly.
For example: Mi madre ha repartido la paella a ojo de buen cubero (My mother divided up the paella roughly).

Something goes according to plan.
For example: La fiesta de cumpleaños salió a pedir de boca (The birthday party went according to plan).

To make your mouth water.
For example: ¡Qué bien huele ese guiso! Se me está haciendo agua la boca (That stew smells great! It's making my mouth water).

Loose lips sink ships (literally: the fish dies by mouth).
For example: Deberías ser más prudente al hablar y no contar tantas intimidades de la gente. Ya sabes que por la boca muere el pez.

To talk someone’s ear off/to bend someone’s ear.
For example: Siempre estás hablando de tu novia. Deja ya de comerme la oreja (You're always talking about your girlfriend. Stop talking my ear off).

Barely, by the skin of your teeth.
For example: He aprobado el examen por los pelos (I passed the exam by the skin of my teeth).