doing something great, something spectacular at your house, job, or any social activities with friends; doing very well or better than others at any sporting activity, like basketball, football, golf, tennis, baseball, volleyball, ping pong, pool, etc.; being awesome
The point guard is straight ballin. Dude is ballin outta control today. I can't believe he did that, that's ballin.
by mclovin_shane January 13, 2012