Fiddlesticks is one of the original champions in League of Legends, released by Riot Games in 2009 as a living scarecrow from Runeterra. His major rework in 2020 gave him a far more terrifying design and voice, built around ambushes and fear effects. Clips of his whistling and voice lines spread through game edits, montages and meme pages, where players use the sound to signal that a creepy ambush is coming. It remains popular because the whistle is instantly recognisable to League players even without any visuals.