YESIDOTHINKSO is used to express smug agreement, self-satisfaction, or sarcastic confirmation. It conveys a sense of "I told you so" or "I was right all along" with a condescending or superior tone. The emote is often used when someone wants to smugly affirm their own opinion, mock someone else's incorrect prediction, or sarcastically agree with an obviously wrong statement. It's the visual equivalent of saying "Yes, I do think so" in the most self-satisfied way possible.
YESIDOTHINKSO originates from the Twitch streamer Forsen (Sebastian Fors), a popular Swedish variety streamer. The emote features Forsen's face with a smug, self-satisfied expression and slightly raised eyebrows. It was created and became popular within Forsen's community around 2016-2017, and is part of the FrankerFaceZ (FFZ) emote collection. The emote captures a moment where Forsen appears to be smugly agreeing with something or confirming his own opinion with an air of superiority.
The emote is commonly used in several contexts: when a streamer or chatter's prediction comes true and they want to gloat about being correct; when someone makes an obviously wrong statement and viewers respond sarcastically; during debates in chat when someone wants to smugly assert their position; when a streamer does something predictable and chat responds with mock surprise; or in Forsen's community specifically as part of the ongoing banter and spam culture. It's particularly popular in competitive gaming streams when predictions about gameplay outcomes are proven right.