some one with a stick up their ass. Someone who is so focused on following the rules that they often seem to have no sense of humor, no spontaneity, and no desire for fun.
Normal Guy: "Dude! Do you want to come to our sweet party tonight? We're playing pong!"
Stick-Ass: "No. Underage drinking is not something I would like to take part in. Why don't you just follow the rules?"
A form of graffiti and also vandalism. Mostly used with intention of getting your work out their without the hassle of buying paint and starting to paint walls. Its harder to get caught and punished for this opposed to tagging/bombing walls. Good for graffiti beginners.