Really? That's odd, since the official language of the country is English.
But seeing your posting history, I can easily see you're not one of the brightest people out there... So it is no surprise to me the you tried to offend me in some weird way while writing in Spanish(I don't know why, but I have a strong feeling that you are one of those ignorant morons that think that Brazilians speak Spanish) literally "To eat shit!", which in Portuguese would be very similar to Spanish: "Comer merda!".
Even so, nobody would understand what you are trying to say, since this doesn't make any sense at all. Most people would deduce that you are trying to say that YOU eat shit, if someone heard the idiocy you wrote... Which again, it wouldn't surprise me if that were true. You seem like the type that would eat shit.
So, after embarrassing yourself, you should be happy that you learned that Brazilians speak Portuguese, but this level of ignorance has a long way to go to get fixed, so here's another lesson for you in Portuguese: "Coma merda!" (This translates to "Eat shit!" in English).