It's called bakaj ball [like back-age]
You have a pit or just an area that you and your friends can stand around, you lay things like logs and chairs and things you can bouce a ball off of in it. Then you get a golf ball or just some type of small ball and bounce it off the things trying to hit the other people. If it lands somewhere out of the pit people near it race to get it. you get a point for each log you hit and each person you hit. And you move around the circle in like a rotation.
It's so fucking fun.

and I think those are the only rules. O__o

PLAY IT AND SPREAD THE WORD