Informal term, often used in colloquial speech.
El gatazo que vi en el zoológico era impresionante por su tamaño y agilidad.
The big cat I saw at the zoo was impressive for its size and agility.
El gatazo que vimos en el zoológico era un majestuoso león de melena dorada.
The big cat we saw at the zoo was a majestic lion with a golden mane.