Bonk is a classic cartoon impact sound, the kind of hollow thud used for decades to show a character being hit on the head without any real harm. Online, the repeated version became a shorthand for playful punishment, especially in meme edits and short-form videos where a character needs correcting after a silly comment or bad decision. Its simple rhythm makes it instantly recognisable, easy to drop over almost any clip, and that flexibility is why creators keep returning to it for quick, light-hearted comedy.