This sound is associated with Monkey D. Luffy from One Piece, the long-running anime and manga created by Eiichiro Oda. Luffy's laugh spread widely through anime clips, fan edits, and short-form reaction posts because it captures his carefree, adventurous personality in a second or two. It is still popular in meme culture for scenes that need a light, mischievous payoff, especially in anime-focused content where viewers instantly recognize the character's voice and attitude.