mandar a la mierda

Literally, “to send to the shit”.

mandar a la mierda (first-person singular present mando a la mierda, first-person singular preterite mandé a la mierda, past participle mandado a la mierda)

1. (idiomatic, vulgar) To score off.
2. (idiomatic, vulgar) To tell someone to go to hell; to tell someone to go fuck themselves.