The phrase comes from Brazilian internet slang, where nao me misturo com viciado has become a shorthand refusal repeated in soundboards and short videos. The longer version adds nem com vagabundo, sharpening the insult into a comic put down rather than a literal statement. Clips of the line circulate mainly through WhatsApp audios and meme pages, where users send it as an instant reply instead of typing an argument. Its staying power comes from the recognisable wording and deadpan attitude, which fit almost any awkward invitation or dubious suggestion online today.