Majadero
A Spanish term used when addressing someone who's out of line and should be put in place. It could take on different meanings depending on the situation. A majadero could be stupid, arrogant, ignorant, etc.
Pedrito: Yo no voy a hacer nada hoy mama!
Mama: Oye majadero e mierda callate y anda limpia tu cuarto!
Mama: Oye majadero e mierda callate y anda limpia tu cuarto!