Hey baby comes from Butt-Head, one of the two teenage leads in MTV's animated series Beavis and Butt-Head, which first aired in 1993. The character's slow, nasal voice and crude attempts to sound smooth made the greeting a memorable part of the show's humour. As clips circulated on early soundboards and later on YouTube and TikTok, the short line became shorthand for awkward flirting and misplaced confidence. Its brevity and instantly recognisable delivery keep it useful for reaction videos and edits decades after the series began.