“Ya du caca” circulates online mainly as a short French reaction audio rather than a long-form quote people search for by source. It shows up in meme compilations, reposted clips and chat-forwarded edits because the phrase is easy to understand even for non-French speakers. Its staying power comes from how quickly it delivers a crude joke: one short line, immediate payoff, and an intentionally juvenile tone. It is often used in the same spirit as a bruh reaction or a fart with reverb style gag.