Scooby Doo first appeared in Scooby-Doo, Where Are You!, the Hanna-Barbera cartoon that premiered in 1969, and the Great Dane quickly became known for his nervous chuckle and catchphrases. The laugh, performed in the show's classic run, has been reused in countless later series, films and clips, helping the character stay recognisable across generations. Online, short cartoon laughs like this one circulate as meme sounds because they instantly signal silliness without needing context, and creators keep returning to Scooby's laugh for its nostalgic, family-friendly humour.