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15.
1337 language for the word Leet.

A type of language used in games, same words just changing the word to have letters in it.

This language is read easily by nerds who play games all day and type superspeed.

Nerd___N3rd
Typer___7yp3r
Game___64m3
Random___R4nd0m
Like___11k3
Hairy___H41ry
Language___14n6u4g3
Quit WoW___Qu17 vv0vv
Don't play Runescape___D0n'7 pl4y Run35c4p3
Plox___P10x

0k y0u g37 7h3 1d34...
1337

0mg 7h15 l4n6u4g3 15 us3d 2 0f73n 1n v1d30 g4m3s, 0n1y g4m3r n3rd5 t41k 11k3 7h15.

7h15 l4n6u4g3 15 v3ry p0pul4r 7hr0u6h0u7 7h3 n4rd vv0r1d.

by Sephire000 July 10, 2008
 
16.
1337 Kelvin, the melting point of gold.
that's right kids, gold is 1337!
by da duckster August 24, 2006
 
17.
A sub-language invented by the hacker culture during usenet days. Letters would be replaced with numbers to make it harder for non-hackers to search for conversations and pick up on what hackers were doing at the time. It got the name "1337" from the word "elite", which where what hackers were. Unfortunately, script-kiddies caught on, and completely missing the point of 1337, instead began to use it to write EVERYTHING, thinking it would earn them passage into the hacker culture. Little did they know that it actually required knowledge to become a hacker. Now it is openly mocked by the hacker community, making fun of the kids who still use it although it's more than 30 years past it's usefulness, instead replaced by 128 bit AES encryption and the like.
D00d! 1|\/| 4 1337 H4X0R |\|0W!!!!111!!1
by Black Leopard May 04, 2006
 
18.
A language that you use if you only have a number pad for a keyboard.
1 4^^ 1337.
1 #4\/3 /\/0 l{3¥804l2l)

I am leet.
I have no keyboard.
by 1337 C70n3 February 26, 2008
 
19.
The practice of using visually similar characters to replace the characters of everyday words. Many wanna-be hackers (13-year-old gamers who watched The Matrix one to many times) try to sound "professional" by talking in 1337 5p34|< (leet speak) during online games and internet forums. However, with all creatures, the ability to speak does not guarantee intelligence.
Wanna be: j00 F00! 1 r0x0rs j00! 1 4/\/\ 1337 H4x0rz!

Forums Moderator: Do you even know the difference between a MAC address and an IP?
by Cyberopts July 24, 2005
 
20.
1. Used by both n00bs and true 1337s alike in order to convey their h4x0rz 5k1lz in a particular medium, primarily video and computer games. Its usage has become widespread, and now includes, but is not limited to, sports, sex, fighting, driving and eating. Essentially a synonym for "good."

2. An integer between the number 1336 and the number 1338.

3. The year that marked the beginning of the Hundred Years' War between two houses of the European nobility. These consisted of the House of Valois, who claimed the title of King of France, and the Plantagenets from England, who claimed to be Kings of France and England. Contrary to the implications of the name, the war lasted 116 years, ending in 1453.
1. z0mg m8 t4ht h4x0rz iz t3h 1337!

2. Guy #1:I'm thinking of a number between 1336 and 1338. What is it?

Guy #2: That's easy, you fuckwit. It's 1337.

Guy #1: Unfortunately for you, I didn't specify whether the number was an integer or not. I was, in fact, thinking of the number 1336.77389.

3. My favourite war is the Hundred Years' War, beginning in 1337 AD.
by Rob Knight May 30, 2008
 
21.
Otherwise known as 'Leet', 1337 is Internet slang that replaces letters with numbers. Mostly used by assholes in games or chatrooms who think they are above than everyone, think they can do what they like, think they are cool and think they are hackers. In real life they spend too much time on the computer, refer everyone as n00bs, have no social life and have no friends. If you think your 1337, your gay.
'leet' guy: 0m9 1 t0t411y pwn3d j00 1 4m 50 1337!!
normal guy: Stop talking in numbers you retard.

Translation: Oh my god I totally owned you I am so Leet!!
by John Clarkie April 21, 2008