F1337 

a group or clan of expert gamers

guy1: "Man your insane!"

guy2: "That's cause im with F1337."

F1337 by 1234mnbv April 25, 2011

f1337 

Combination of Fucking and 1337.
Emphasized even more as an entire fleet of 1337's.
Originated by my own slurring of words.

That shot was f1337
That's because I'm f1337

f1337 by Insignia January 21, 2006