This sound comes from League of Legends and is associated with Shaco, the assassin champion known as the Demon Jester. The clip is the character's in-game death audio, heard when Shaco is killed during a match. Short champion death sounds like this spread through gaming communities because they are easy to recognize, easy to isolate and useful for comedic timing in montages. It still gets used in League edits, streamer highlights and meme clips whenever a clever play suddenly falls apart.