Slime Rancher is a first-person farming adventure game developed by Monomi Park and released in 2017, in which players raise colourful, bouncy slimes on a distant planet. The game's slimes make short, expressive noises as they bounce, eat and react, and clips of those sounds have been shared widely in gameplay videos and short edits. This cheerful woohoo has become a handy reaction sound online because it is instantly recognisable to players and works as a light, positive punchline even for viewers who have never played the game.