It means lose/lost.
Me(while playing la game): Dang it! I died .My friend: L
LLLL
L-Loser /you
L = LOSER
JEREMY THE RETARD : OMG YOU BOZO RATIO BLACK MONKEY ORANGE CHINESE ORANGUTANG YOUR SUCH AN L Jeremey isn't that smart. His dad left him when he was 2
Loss
Damm he took the l there
L = loser.
Mike: OH NU I FELL INTO TO THE VOID! Rick: L lol.
Adam. This specimen defines the letter L. He is incompetent and idiotic.
L is dumb.
Short for Loser
Man, Karen took the kids, she is SUCH an L