Skillz are gained through
experience and
practice, the combined sum of which make one
1337.
Examples of skillz (with respect to gaming) particularly in
Urban Terror:
Headshots 75% of the time
Mastering those
trick jumps
Playing the
counter-sniper role without
night vision goggles
Having your
kill-to-death ratio be undefined
Being able to
hold your own, no matter which weapon you pick
Hand grenades my friend, hand grenades
Taking out that
TKer before he lays waste to your team.
It should also be mentioned that skillz are
evasive little bastards, often fleeing at
critical moments such as
clanmatches, or after you've talked some serious
smack.
There are of course many more skillz, and the aforementioned ones are certainly not enough to make you
1337 by themselves.