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1. To be the coolest of the cool, as well as the ability to have completely mastered the technique of true balance

2. Off the hook, or very precise, very cool, very on time, just grossly accurate
Matt threw a potato chip across the large room, and made it land directly in craigs mouth. Matt is On Da Ball!

Joe Stood on a basketball without even wabbaling he is so on the ball!

Jane entered the room at 6:00, which is precisely when the party started.
by [raig August 31, 2007