1. Your grandma says “¡Ave María Purísima!”
Literal translation: “Hail purest Mary!”
To express surprise or shock about something. She’ll pick a main character for this expression from the whole Catholic saint dynasty, according to her personal preferences and the intensity of the surprise. She’ll usually cross herself during the exclamation to add a touch of drama. Youngsters have substituted this expression with the more profane “Ay güey!”…and they no longer cross themselves.