SourPls is based on a video featuring a man dancing in a Toys ”R” Us store. The video was originally uploaded by the user called SourNotHardcore, where the name of the emote comes from.
The emote can be used to express celebration on the streaming website Twitch.tv, where the emote is available, if the user has the browser extension called BTTV (Better Twitch TV) installed, thus giving them access to more unique content to enhance viewing experience.
The emote SourPls is based on a youtube video from 2007. where a man can be seen dancing in a store, which was later turned into a .gif (moving image), which was then used on image and message boards on the internet, most notably on sites like Reddit and 4chan.
The earliest known mention of the emote was in 2014. on the social media website Twitter, where it was shown, when the SourPls emote was used in chat, it would make it completely unreadable.
As of 10/12/2019 according to the website StreamElements, SourPls is the 18th on the list of most popular/used emotes on the streaming website Twitch.tv, making it one of the more popular emotes.