The meme centers on Toothless, the Night Fury dragon from DreamWorks' How to Train Your Dragon, first introduced in 2010. Online creators turned a simple dancing animation of the character into a reusable reaction format, often reposted as short loops, GIFs and captioned edits. Its popularity comes from the contrast between Toothless being a beloved movie character and the deliberately awkward, cheerful dance. The sound remains popular because it fits short joke edits, pet videos and low-stakes celebration posts without needing much setup.