Tubby Custard comes from Teletubbies, the BBC children's series that first aired in 1997 and followed Tinky Winky, Dipsy, Laa-Laa and Po in Teletubbyland. Their pink custard, served from a machine in their home, became one of the show's most recognisable and parodied details. As clips of the series circulated online, the custard became shorthand for childhood nostalgia and cheerful absurdity. Short sounds connected to it are now reused in memes and edits because the reference is instantly understood even without any dialogue.