Pain chiasse circulates on French speaking meme pages and soundboards as a short gross out quote, built around the line le pain goût chiasse. Chiasse is vulgar French slang, so the joke is the shocking bluntness rather than any subtle wordplay. It is often posted alongside other crude reaction clips like fart with reverb in compilations of disgust sounds. Because the meaning is easy to guess from the tone alone, even non French speakers reuse it for food fails, bad smells and nasty surprises.