The sound comes from Hulk Hogan, one of the most famous professional wrestlers of the 1980s and 1990s, whose promos often included calling people “brother.” That delivery became a recurring catchphrase tied to his larger-than-life persona. Online, short Hogan clips spread through wrestling compilations, meme edits and reaction videos, where the word is used to signal exaggerated confidence, old-school wrestling nostalgia or a jokingly intense response. It remains popular because even a single word instantly evokes Hogan’s voice and character.