Great, I can now imagine The Rock using that in a promo.
BTW, this was in the Observer:
The company’s goal for some time has been to make Stephanie the business face of the company. The name of the book may be “Lady Balls.” WWE this past week, just before the book announcement, took out trademarks for that phrase and listed it for toys, books and computer software. So it may be that the book title will also be used to market toys for girls, and it’s very clear they want that phrase to be marketed and part of their future lexicon.
27th Open The Dream Gate Champion - Masato Yoshino
Yeah, this sounds like a nickname or part of a catchphrase (particularly something you'd see written on a T-shirt), i.e. a female bragging that she has big balls. Fairly certain no one is actually gonna be called Lady Balls.
Of course, Stephanie will probably give the nickname to herself because reasons, but whatever.