The chant comes from 'Who Let the Dogs Out,' the 2000 single by Bahamian group Baha Men, itself a cover of Anslem Douglas's 1998 song 'Doggie.' The track became a global hit, reached the top ten in multiple countries, and won the Grammy for Best Dance Recording in 2001. Sports stadiums adopted it as a crowd anthem, and its barking hook lived on through commercials, movies and video games. Online it survives as a go-to sound for anything involving dogs, sudden chaos or rowdy entrances.