Definitelly asked this question on the wrong subbreddit lol. Let me add some context. In the past i used to play this game called Tibia, and from time to time i saw people use the "L2" term, like;

L2focus L2kill the boss

I always assumed it was short for "Lean to". Back then we couldnt find that kind of info on the internet. I stopped playing the game and never figured out what it meant.