Is it possible to lose a few pounds in about a week?

I'm going to be hanging out with a guy friend sometime next week and we might get a little...frisky...hahaha But anyways, I've put on a couple pounds (from eating junk food and being lazy for a week) and I'm wanting to get it off before I go. I'm 115ish right now and I'm usually around 110-112. I want my stomach to go back to being flat because right now it's a little chubby. What can I do?