Eh-oh is the friendly greeting used by the Teletubbies, the four colourful characters at the centre of the British children's television series Teletubbies. Tinky Winky, Dipsy, Laa-Laa and Po use the phrase to say hello to each other and to viewers, and its simple, sing-song sound made it one of the show's most recognisable catchphrases. As clips from the series circulated online, the greeting became a nostalgic shorthand for childhood television, and it is now widely reused in short videos, memes and soundboards as a cheerful hello.