Definition: 1337 is hacker speak for "leet," which is an abbreviation of "elite." This term was derived from 31337 "eleet", the UDP port used by the Dead Cow Cult hacker group to access Windows 95 using Back Orifice, a notorious hacking program. Employing various numbers as letters has become a common way to avoid censorship and look cool. Hence you will often see 1337 used in conjunction with terms like "r0x0rz" and "ub3r".
Also Known As: leet, elite