The line comes from the Brazilian Portuguese dub of Everybody Hates Chris, where Julius Rock is known for his strict, money-conscious humour and deadpan reactions. Brazilian viewers turned his warning into a standalone meme, sharing it in short edits and WhatsApp audios whenever someone needed to say they were not joking. Its popularity grew through reaction videos and TikTok edits that reuse the same serious tone for everyday bluffs, bets and promises. Because the phrase is short and instantly recognisable, it still works as a punchline without any extra context.