LL is a Twitch emote and chat term that plays on the concept of taking an "L," which means to take a loss or experience failure. "LL" doubles this, implying a particularly bad or embarrassing loss, or a series of losses. It is often used humorously or sarcastically to mock someone who has failed in a game or situation.
Origin
The use of "L" to signify a loss comes from sports and internet slang, and it became popular on Twitch and other social media platforms in the late 2010s. The "LL" emote is a community-created variant that exaggerates the original meaning. There is no specific streamer or exact year tied to the origin of the "LL" emote, but it started appearing in Twitch chats and emote libraries around 2019-2020 as a way to intensify the joke of taking an "L."
When to use
When a streamer or player makes a significant mistake or loses badly in a game.
To mock or tease someone in chat who has failed at something.
During moments of repeated failure or when someone is on a losing streak.
As a playful or sarcastic response to any kind of mishap or blunder.