The phrase itself is common Portuguese slang, combining an old-fashioned invocation of Our Lady with the informal mano, meaning mate or bro, to express astonishment. Online, the clip circulates mainly through Portuguese and Brazilian meme pages and short-form edits, where its short length makes it easy to drop over fails, reveals and pranks. Its popularity comes from that everyday, spoken feel rather than a single famous scene, and it sits naturally alongside other reaction sounds like Oh My God Meme for moments that need an instant, human response.