CC = Check/Call.

WA = Way Ahead.
WB = Way Behind.

Theres a thread stickied in this forum that covers all the terms.

WA/WB generally means you're in a situation where you're winning by a lot, or losing by a lot. In this situation if you bet, you're almost certainly only being called (or raised) by hands better than you, so theres no value in betting. On the other hand, if OOP, if you check then worse hands than you may bet and you can call them.