The phrase comes from Brazilian Portuguese slang, where marretada means a blow from a sledgehammer and Thor evokes the Norse god's famous hammer. The clip spread through Brazilian WhatsApp groups, Discord servers and short-form video edits, usually in the form toma marretada do Thor, meaning take Thor's hammer blow. Because Thor is widely recognised from mythology and superhero films, the joke translates instantly even for non-Portuguese speakers. Its brevity keeps it popular as a reaction sound that can be replayed, layered over gameplay, or sent as a standalone punchline in chats.