The phrase is German for your notes are rubbish, with the final swear word cut short in this clip, which is part of why it circulates as a reaction sound online. Short German shout clips are often shared on soundboards for their blunt, theatrical anger, and this one fits school and office jokes especially well. It is used in memes, short videos and group chats whenever someone wants an instant, over-the-top rejection of written work without explaining the joke in detail.