Duder is a word of many possibilites. It can be used as a replacement for dude. It can also be used to mean someone is more dude-like than someone else (as in dude, duder, dudest.) It has also been known to be used to describe objects for which the name has been temporarily forgotten, or otherwise unknown to the user of the word. Still yet another usage is a verb which means the act of being a dude or doing dudely things.
Hey duder, come over to my house.
Steve is duder than I am, but surely not the dudest guy in the room.
Beth need help to figure out how to opperate this new duder she got.
I think I'm going to go put on my sunglasses and duder around town.
usually used when describing a male, a new pronoun that can be a subject, direct object or indirect object - may also be used for females and pretty much anything as long as the meaning is described in context
Yo duder, what's up? I'm heading down to the board shop to get this little duder fixed. I smashed up the nose on a mean duder. Tranlation: Yo man, what's up? I'm heading down to the board shop to get my board fixed. I smashed up the nose on a big wave.