1337 speak 

the stupidest speak ever invented.....only nerds talk like that.

i am a loser cuz i speak 1337 speak.
standard english version: i am a loser because i talk in the 1337 speak.

1337 speak by funky boogers June 27, 2006

1337 speak 

talking in a way that places numbers in the place of certian letters
1 = l or i
2 = R
3 = b
4 = A
5 = S
6 = G
7 = T
0 = O

"h0ly sh1t 1 ju5t pwn3d that n00b!"

1337 speak by sylen.emu June 6, 2003

1337 speak 

1337- LEET- ELITE

To put it simply, someone who is the pwn (owns other people) or who thinks they are anyway.

I pWn j00 4ll! ph3aR ME!

1337 speak by amelia October 11, 2004

1337 speak 

Doesn't 1337 speak come from Counter-Strike 1.6?
Google 1337 Krew :)
From there we started using nub and n00b, and h4x and the language evolved...
You could often interchange characters for the same meaning:
7h475 6234t / th4t5 6r34t / thats great -- or n!nj4 / |\|1|\|j4 / n1nj4 -- you get it..

1 u53 1337 5p43k 1!k3 7h15 1337 speak

1337 speak by roboturner November 25, 2015

1337speak 

A form of online slang that substitutes normal lettering for numbers or symbols.

4LL j00 n00b5 b0w t0 my h4x0r 5k11L5

1337speak by flushes May 24, 2003

1337speaker 

a 1337speaker is a person who thinks it is cool to use 1337speak in games and their lives

1337speaker: omfg, n00b it totaly pwned you in that test, lol

1337speaker by sam grist April 23, 2007