Leetspeak or leet — "leet" is derived from the word "elite." It's a way of spelling common words either phonetically or with the substitution of numerals. For instance, "leetspeak" would be "l33t," since the numeral 3 bears a resemblance to the letter E. Other examples: pr0n: porn d00d: dude n00b: newbie, or new person. This one sometimes is meant to be vaguely insulting, tagging someone as a novice or unwelcome newcomer. joo, j00 and u: you