The boing is one of the oldest cartoon sound effects, a spring reverb-style wobble that became shorthand for anything bouncy in classic animation. Its exact first recording is undocumented, but the sound spread through decades of cartoons, comedy sketches and kids' shows before landing on modern soundboards. Today it lives on in memes, gaming clips and cartoon fail moments, where editors use it to sell squash-and-stretch movement or punctuate a silly landing.