Vilebrequin is a French YouTube duo known for playful, often chaotic car videos, and 'c'est pété' is their shorthand for something being broken beyond repair. The phrase caught on with French-speaking viewers because it sums up a failed build or a wrecked car in two words, and short clips of it spread through edits, streams and soundboards. It remains popular as a quick fail sound because it is instantly understood by fans and works even for viewers who only recognise the tone of defeat.