adj.- In gaming, a term to describe one with a great deal of skill, or to describe incredibly advanced technology. One who is l33t is the opposite of being a noob
. L33tness is relative but usually comes with experience and skill (or upgraded hardware for better gaming speed and performance).
Dude, my computer is l33t! It has the newest graphics card and 5 gigabytes of RAM.
Haha! My l33tness will always pwn your noob ass.