Muscle Man is a character from Regular Show, the Cartoon Network animated series about two park groundskeepers, Mordecai and Rigby, that ran from 2010 to 2017. Voiced with a deep, working-class growl, Muscle Man became a fan favourite for his blunt humour and catchphrases. Clips of his voice later spread on soundboards and short-form video as quick reaction audio, with this womp womp used in the same way as the sad violin meme for failed moments. Its short length and instantly recognisable disappointment keep it useful for creators who need a fast, funny letdown without explaining the joke.