The name refers to a Pinkie clip that circulated online in 2016, when short cartoon voice bites were widely reposted as reaction sounds on soundboards and in fan edits. Pinkie Pie, the hyperactive pink pony from My Little Pony, became a popular source for these clips because her squeaky, enthusiastic delivery is recognisable in just a second or two. This version survived as a standalone sound because it needs no setup, fits almost any cheerful reaction, and can be dropped into videos, streams and chats without explaining the original scene.