vaca sagrada

Portuguese

Noun

vaca sagrada f (plural vacas sagradas)

1. Used other than figuratively or idiomatically: see vaca,‎ sagrada.
2. (idiomatic) sacred cow (something which cannot be tampered with)

Spanish

Noun

vaca sagrada f (plural vacas sagradas)

1. sacred cow

Further reading

• “vaca sagrada”, in Diccionario de la lengua española, Vigésima tercera edición, Real Academia Española, 2014