Here we go, not for the timid
Here's some fun topics,
1) Complain about how some girl keeps hitting on you
2) Poke fun at her outfit
3) Anything about sex, thats a good topic. (unless she's a "good-girl", and don't worry, "good-girls" are anything but.)
4) Tell her to stop flirting with you, especially if she's not.
5) Make sure you don't lean up in her face while talking, sit back, slightly slouched. The "CEO slouch" as it's called.
6) be sarcastic.
7) don't ask a lame question about where she went to school, or how many siblings she has. It's not a job interview, avoid the questions intentionally and she will tell you. At which point you can call her on forcing boring subjects upon you.
*Note- these aren't traditional topics but they get the ball rolling, she'll start telling you about something."