Online, kahaha is used as a shorthand for a big, theatrical laugh, especially in anime edits, meme videos and reaction clips where a normal chuckle would feel too small. The spelling itself mimics the sound, so it is easy to search for and instantly understood by viewers who recognise the style of laugh from cartoons and games. Short laugh clips like this keep circulating because they work as a quick punchline, a villainous reaction or a way to mock a failed plan without needing any dialogue.