Whatever dude, this dude has got a lot of time on his hands. 
http://story.news.yahoo.com/news?tmpl=story&cid=519&e=1&u=/ap/read_thisDude, you've got to read this. A linguist from the University of Pittsburgh has published a scholarly paper deconstructing and deciphering the word "dude," contending it is much more than a catchall for lazy, inarticulate surfers, skaters, slackers and teenagers.