A typing language similar to hacker speak where you replace normal letters with their innacurate and altogether fucked up counter parts. Often used in conjunction with Caps Speak, where every second letter is capitalized (example LoL tAhT iS SoOoOoO kYuElL). Unendingly irritating and pointless since you can type out what you're trying to say with regular uncapitalized letters faster and with greater understanding of their meaning.
A typical MSN conversation:
"Dude, don't use AOL speak..."