best friends is an expression of the English language and that means "best friends", in the literal translation into Portuguese.
It is often used to refer to closest and most trusted friends that a particular person has within a group.
You best friends often share joys and sorrows, victories and defeats, loves and disappointments. They consider themselves members of the same family, due to the level of intimacy and trust they have between them.
Even though it is an expression in the English language, the best friend in Brazil, mainly among young people and teenagers on social networks such as Facebook and Twitter, for example.
Typically, this is a more common term among girls, who often just call each other best, showing that that particular person is your best friend.
Learn more about the meaning of best.
There is yet another expression that works as a reinforcement of the idea that one person is another person's best friend: best friends forever, which means "Best Friends Forever".
Among young people, it is customary to use the acronyms BF, to refer to the
best friend, and BFF to best friend forever.Find out more about the meaning of BFF.