Ned Flanders is the devout, endlessly upbeat neighbor of Homer Simpson in The Simpsons, the long running animated series created by Matt Groening that debuted in 1989. His catchphrases, built around diddly and doodly sounds, became one of the show's most quoted running gags. Clips of Hi-Diddly-Ho spread through meme pages, edits and soundboards because the line sums up Flanders in two seconds: kind, earnest and impossible to rattle. It remains popular for greeting memes and reaction videos long after the original episodes aired.