Muttley is the snickering dog from Hanna-Barbera animation, best known from Wacky Races and Dastardly and Muttley in Their Flying Machines in the late 1960s. His wheezing laugh became one of the character’s defining traits and stayed recognizable across reruns, dubbed broadcasts, and online clips. Today, the sound is widely reused in memes, reaction videos, and short edits because it instantly suggests sly amusement, mockery, or a guilty little laugh without needing any setup.