De la merde is a French expression that literally translates as of shit and is commonly used as a coarse way to say something is rubbish or nonsense. Online, short foreign-language reaction clips like this one circulate on soundboards and in meme edits because the meaning is clear from tone and context even without translation. Creators reuse it as a quick, universally understood dismissal, and its brevity makes it easy to drop into edits, streams and chat reactions without interrupting the flow of a video.