Used only to say hello to someone. There are more spellings for similar words to this, which are often confused with this word, but mean something totally different. Examples are the words 'wird' and 'whurd'. They all have different meanings.
cool, really, nice, thats pimped, and also can be used for ie aa x90. basically just ya thats fat cool i use this word when i dont know what to say to annoying people on aim or aol =)