Yeetin comes from yeet, internet slang for throwing something with force and little care for where it lands. The word spread widely through Vine, gaming clips and meme edits in the mid 2010s, and forms like yeeted and yeetin became common captions and voiceovers. This short version is used less as a standalone joke and more as a quick audio cue, added after the fact to turn an ordinary throw, jump or ragdoll fall into a meme moment that viewers instantly understand.