A misrepresentation of the term The ball is in your court, as said by our fine Japanese colleagues. Its just funny to think of an actual ball being in your coat.
Employee # 1: Have you been working on the Johnson file?

Employee # 2: No, I'm waiting for information from their end. The ball is in their coat.
by Youthful Wisdom August 5, 2005
Get the the ball is in your coat mug.