I had a similar issue with a pick guard screw that I stripped by removing my pick guard so much while experimenting with electronics. While I certainly didn't get this issue in such a colorful way as you--I'm way more boring--it still was an annoyance to me. I fixed the problem by purchasing some wood putty, filling up the old hole, drilling a small pilot hole, and screwing the wood screw back into place. It's been solid for about 2 years now.
The only additional issue I can see here is that you will be placing a lot of stress on the joint whilst you perform your cool tricks--so I recommend patching and re-drilling as I mentioned above along with getting a longer screw. Probably double the length of your current screw should suffice and you can get those types of wood screws at any hardware store cheap--just remember to take the original with you so you get the correct diameter, thread grain, and screw head. Wider screws have the potential of cracking the body just like @InternalConspiracy mentions, but a longer screw will increase the development length of the screw in relation to the wood. This will make your strap lock more sturdy, because there are more turns of the screw in contact with the wood allowing it to remain in place and dissipate the forces of your antics more evenly. Additionally, a deeper screw will be sturdier because it prevents more rotation--what's known as a moment in physics and engineering.
I realize that's way more technical than you probably care to go, but there are advantages to being married to a civil engineer XD.