A try hard on Xbox Live, who is actually good at games. They bring a losing team back into the game and save the scrubby nubs when they are being stupid.
Zimmer: Hey look at that XBL Hero! He just saved me that butterfly!
Jay: Don't worry about it, its what I do.
Nate: Wow! I want to be just like him.
When somebody on an mmo thinks that they're pro - 'Hero' but they're not, so there is an 'x' on the end. Usually they're the type of gamer that puts others down to try make themselves feel better about being low down on the mmo food chain.
Most frequently males, that try to be cute. However 'Herox' are a rare breed, Troll them while you can.
Herox: Oh I'm so awesome.
..
Herox: Me failing there was completely intentional, I was just checking how bad you were.
Pajama casual is a term used when working from home and preparing for a video conference. All business above the waist and your pajama pants down below.