Mehehe has circulated online mainly as a short reaction laugh, shared in meme edits, gaming clips, and short-form videos where a quick giggle says more than a caption. Its appeal comes from its ambiguity: it can sound cute, cheeky, or faintly villainous depending on the face or scene underneath it. Because the clip is under three seconds, creators can slip it between dialogue, sound effects, and music without breaking the pace. That flexibility has kept it useful for pranks, fails, and playful reveals.