This is a humorous Spanish phrase used to describe someone who is extremely lazy. It literally translates to 'he's lazier than the upper jaw', suggesting that even the upper jaw, which doesn't move during talking or eating, is more active than the person in question.
Examples
- Spanish: Mi hermano no ayuda en casa, es más vago que la quijá de arriba.
- English: My brother doesn't help at home, he's lazier than the upper jaw.