The line comes from South Park, the animated television comedy created by Trey Parker and Matt Stone that premiered in 1997. “Kick the baby” became a recurring early-series gag between Kyle Broflovski and Ike, with Kyle setting up the phrase before sending his adopted baby brother flying in exaggerated cartoon slapstick. Fans carried the exchange into quote compilations, soundboards, remixes, and short reaction videos. It remains recognizable because the setup is brief, repeatable, and instantly signals an incoming impact or deliberately inappropriate joke.