The exact origin of this clip is unknown — it appears to be a user-recorded voice note rather than a line from a film, show or song. The phrase itself is European Portuguese slang, pairing 'amo-te' (I love you) with 'fds', shorthand for a common swear, to make an affectionate insult popular in memes and group chats. Short voice clips like this spread through soundboards and messaging apps, where their raw, personal feel makes them perfect reaction material. It endures because the joke needs no setup: love and irreverence in two seconds.