The hee-hee is one of Michael Jackson's signature vocal ad-libs, a playful sound he used across his solo performances and recordings to add rhythm and personality. Fans and editors later isolated the short giggle from longer tracks, and it spread through soundboards, reaction videos and short-form edits as an instantly recognisable shorthand for mischief or excitement. Because it needs no words to be understood, it still works across languages and formats, keeping Jackson's stage persona alive in memes long after his performances ended.