Leet
Leet-speak is a mixture of words (mostly computer-related jargon) spelled incorrectly intentionally*, usually coming from typographical errors (e.g. the becomes t3h). The words of Leet-speak are usually put together to create a dialect (small language). This dialect is used in some places for funniness. l33tspeak uses numbers, ASCII symbols, and diacritics together to make symbols that look like Latin letters. For example, the name "David" would translate in 1337 as |)/-\\/1|) or more commonly as D4v1d.