Boa tarde and boa noite are standard Portuguese greetings used every day in Brazil and Portugal, the first for the afternoon and the second after dark. As a short recorded clip, the paired phrase spread through messaging apps and soundboards where brief, recognisable greetings are reused as reactions and intros. Its appeal is simplicity rather than a specific show or character, so creators borrow it to add a polite, slightly humorous Brazilian flavour to edits, streams and group chats without needing a longer explanation or context for the joke to work.