Negan became one of television's most recognisable villains after Jeffrey Dean Morgan joined The Walking Dead in 2016 as the bat-wielding leader of the Saviors. Clips of the character's calm, menacing manner quickly circulated online as reaction sounds and edits, and his whistling moments became shorthand for a threat delivered with a smile. The clip has since moved beyond the show into meme soundboards, where it is used for entrances, standoffs and mock-serious warnings, long after the character's first appearance.