A dogwhistle used by the right wing community. "yuo" is just a mispelling of "you" it doesn't have any hidden meaning, it's just a misspelling used by right wingers (or sometimes not only right wingers, just people interested in politics) to recognize each other.
Phrase said by Brazilians when yuo going to Brazil. Please, Don't try this at home, most peopledon't survive after this, because of that, we don't know how is Brazil.