Shorthand for 'designated driver.' The person who escorts you to the club, drinks lightly if at all, and helps drive you home after a long night of cirrhotic frivolity. D2s are occasionally given special treatment by bartenders for their services, such as offering snacks and non-alcoholic beverages to dedicated D2s.
Person 1: "Hey, can you be my D2 tonight?"
Person 2: "Sure! I charge $13 per hour, plus $50 if you vomit in my car."
Person 1: "What? Why are you charging me just to-- ...oh."
The kind of massive raging boner that you can only get when visiting the D2 Dining Hall at Virginia Tech. If you go to D2 and you don't have a boner then you must have a vagina.
Norm: "I have the biggest D2 boner right now! Look at all the fucking food!"
Will: "Man that Calculus test was harder than that D2 boner..."
The greatest movie ever made, and one of the most influential works of art of all time, along the lines of the Bible, The Mona Lisa, the Sistine Chapel, and Beethoven's Fifth Symphony. It also features Jesse Hall, who's cooler than you or Chuck Norris. Also, Charlie Conway likes the penis.
You're watchingD2: The Mighty Ducks Are Back again? Fantastic!