Itai is the standard Japanese word for painful, and repeating it as itai itai is how anime and manga characters commonly cry out after a small injury. Clips of this exact whiny delivery circulate on soundboards and in short video edits, detached from any single scene and reused as a universal ouch sound. Its popularity comes from the contrast between cute voice acting and exaggerated pain, letting creators soften a fall, hit or mistake into comedy. It remains common in anime edits, gaming montages and reaction memes.