Dork in my pants

To be excited nearly to the point of sexual release over something dorky, geekish, or nerdy.

"Oh man, I went into Best Buy and found the complete series of Firefly on Blu-ray! I almost dorked in my pants right there."

"Did you go to the midnight opening at Gamestop for Black Ops?
Hell yeah! I thought I was gonna dork in my pants waiting on line!"