La Boca - Cállate la boca is like telling someone to shut the f*ck up

Cállate la boca is like telling someone to shut the f*ck up and stop being a loud, annoying, dumbass.

My teacher said "Cállate la boca!" when I talked the whole class out of lunch.

My friend said "Cállate la boca!" when I kept interrupting his text message.

My dad said "Cállate la boca!" because I wouldn't stop singing in the car.