Abbreviation of 'Me cago en tus muertos'. A convenient way of expressing the same feeling.
When used in 2nd
person it normally triggers a fight or other strong reactions, due to its extremely offensive nature. Using it in 3rd
person ('sus muertos') is normally more suitable, thus expressing disgust about someone who is not listening.
See also:
definition for 'Me cago en tus muertos'
Student A to Student B: - Quillo, ¿sabes que el profesor te ha cateado física?
Student B to Student A: - ¿Que si? No me jodas, quillo, ¡sus muertos! (refering to the
teacher)
Friend A: - Tio, ayer me acosté
con tu
ex
Friend B: - ¡Tus muertos!