The cartoon boing is a long-running comedic sound effect style associated with classic animated slapstick rather than one single modern meme source. Variations of this springy bounce sound have been used for decades in cartoons, comedy edits, and short-form videos to suggest recoil, wobble, or elastic movement. Online, it remains popular because the meaning is immediate and universal: viewers instantly understand that a moment is meant to feel playful, exaggerated, and silly. It often appears alongside other broad reaction effects such as goofy ahh sounds.