l34t5p34k

l34t5p34k or leetspeak is a name for the style of typing used by many internet people primarily on online games this is where letters replace numbers or vice versa, it is often confusing and difficult to read but comes naturally to most nerds and games.

Examples are n00b(oo replaced by two zeroes) or H34Vy, EA is changed to 34 or l34t5p34k into LEETSPEAK