L2 is a term used in a phrase before any noun. It stands for "Learn To" and is deliberately improper grammar in 1337SPEAK fashion. L2 (Noun) is used as an insult, telling someone to attain a certain skill or learn to properly use a specified noun.
Gamer1: WTF?! I SHOT AT HIM 10 TIMES AND DIDN'T KILL HIM!!!
Streamer slang for holding the trigger down on someone in a video game; usually to mock someone for being unable to play a game and can only win by spamming the trigger button
*streamer gets sprayed down*
Timthetatman - Miss a shot! Holy F! L2 L2 L2 L2
Streamer : Yea you can press L2, congratulations, try getting a shotgun and aiming next time buddy
By Olia
L2
In the world of Escorts and Spa/Studios, L2 is also known as Level 2, or a blow job. (See L1, L3)