Yesterday, April 14, 2015, Twitch.TV rolled out a new emotes. A Twitch emote is a little image that you can summon in chat by simply typing out a set of characters. The new frog face is summoned by typing OSfrog into the chat. It is not everyday that a new free emotes appear so it is a pretty big, nerdy deal!
Twitch users are using it in replacement for the beloved Kappa as this user expressed to me and the rest of chat.
I am not sure if anyone knows why it exists or what it means exactly, but I am sure someone will speak up soon! *** Update*** Turns out Old Spice created the emotes, hence the OS in the front.
I am still hoping for a Dr. Steve Brule emote, I might just have to wait until Epicpower Gaming becomes big enough to make that happen!