Sesame Street
Published September 26, 2026
Sesame Street is the long-running American children's show whose puppet skits and celebrity guest bits became a bottomless well of source clips for YouTube Poop, MAD remixes, and reaction edits. A 2008 Elmo segment with Jack Black defining the word octagon is the single most-recycled moment, spawning countless remix videos across YouTube.
Overview
As a meme, Sesame Street mostly lives on YouTube, where clips from the show get chopped, looped, and pitched around into YouTube Poop and MAD-style remix videos1. Elmo, Cookie Monster, Bert and Ernie, and the many celebrity guest segments give remixers a rotating cast of instantly recognizable characters, which is a big reason the show is such a common source1.
The single most-quoted bit is Jack Black's Octagon, a 2008 segment in which Elmo asks Jack Black to define an octagon and Black responds with an oddly intense performance1. That mismatch between wholesome puppet and unhinged guest is exactly the kind of raw material remix communities gravitate toward, and the segment kept showing up in YouTube Poop videos for years afterward2. Beyond Black, other guest star clips and old classic Sesame Street sketches feed a steady drip of reaction GIFs, out-of-context screenshots, and edits1.