Bart Simpson is the mischievous son in The Simpsons, the animated series that began in 1989, and denying trouble became one of his defining traits. His famous catchphrase I Didn't Do It set the template for countless Bart denial clips shared online. This nuffin version leans into slangy, childlike pronunciation, which made it popular as a short reaction sound on meme pages and in edited videos. Creators still use it because the character, the excuse and the guilty tone are understood immediately, even without any visual context from the show.