Muttley first appeared as Dick Dastardly's snickering dog sidekick in the Hanna-Barbera cartoon Wacky Races, which premiered in 1968, and his wheezing laugh became one of the show's most recognisable running gags. The character later headlined Dastardly and Muttley in Their Flying Machines, keeping the same raspy snicker. Clips of that laugh spread through cartoon compilations and reaction edits, where Dutch viewers also nicknamed the sound for its cough-like wheeze. It survives because the noise needs no translation: a few seconds of snorting instantly signals mischief, mockery and a plan going wrong.