Meaning One:To act 'silly', 'foolish', 'stupidly' or in other words to act like a dork.
Meaning Two:Dorky is a WinBoard computer chess program for Windows.
A conversation between person A and person B:
Person A: Lol, why was the teacher so slack to the asian kid, saying "Two Wongs don't make a White."
Person B: ROFL, man that's so dorky.
A Nice girl, who doesn't hang out with the cool girls and maybe have more boy friends, she loves Sci-Fi, Superheroes and Video Games. Maybe also books and computers. She can be a bit shy, but is mostly really nice.
The quiet girl in the back of the class, who secretly goes home and plays Skyrim, but is to shy to tell anyone. That's a dorky girl!
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.