Hah... and apparently that Portuguese word is now censored. There is a word that starts with "n" and ends with "o" that was used as a technical term (and later slang word arguably) for black people, that legitimately means the color "black" in Portuguese.
"Teu" and "tua "are the possessive forms you use when you are addressing someone as "tu", which is rare in Brazil. Usually you will address people as "você", so you use "seu" e "sua".
Please Mr Duo will you put on a course in European Portuguese? I'm getting tired of being advised what the Brazilians say - I have no intention of going to South America.