No longer the definition for whale penis. It is now Anthony Hunter.

Someone who has odd interests, and is often silly at times. A dork is also someone who can be themselves and not care what anyone thinks.

Someone who sits around, writing the 500th definition for a word in the Urban Dictionary, as if anyone will ever read them all.

(n)a whale penis

someone who does things that are kinda silly and not neccessarily cool but always cute

If a girl calls a guy dork she thinks your cute. If a guy calls another guy a dork he thinks your a loser.

A dork in good terms is a good looking person who does something silly, crazy or just damn funny. Normaly said by a girl to a guy.
Bad terms just another word for nerd or social outcast.

Sometimes interchanged with geek, nerd, gamer, dufus and dweeb. Each have connotations that vary depending on who you talk to or the location. For example, nerd has a negative connotation on the eastern coast of Canada, while geek does on the west.

The definitions from my location are as follows:

A dork is someone that has less-than average intelligence, as well as having fringe interests like RPGs and computers.

A geek is someone who has a higher-than-average intelligence, and is interrested in a variety of fringe interests. The variety is unlikely to encompass the entire scope, and it is likely that the interrests will be interrelated. For instance, you might find a sci-fi geek, a history geek, or just someone who knows a lot of trivia. A geek will still have interests, friends and social skills outside of geekdom, though they may be more limited.

A nerd is someone who usually has a mich higher than average intelligence, but very poor social skills and very few if any friends and interests outside their area of expertise. They will usually have only one or two groups of interest, and are extremely passionate and knowledgeable about them. Often, a nerd will focus on numbers and definitions. A famous subgroup of nerds is the trekkies