Nirmanakaya is a budhism terms that means a perfected astral body, and is referred to as a body of transformation.
(Sanskrit) A compound of two words: nirmana, a participle meaning "forming," "creating"; kaya, a word meaning "body," "robe," "vehicle"; thus, nirmanakaya means "formed-body." A nirmanakaya, however, is really a state assumed by or entered into by a bodhisattva - an individual man made semi-divine who, to use popular language, instead of choosing his reward in the nirvana of a less degree, remains on earth out of pity and compassion for inferior beings, clothing himself in a nirmanakayic vesture. When that state is ended the nirmanakaya ends.
I got my name years ago when I started playing computer games at a local Gaming cafe. I wanted to use "Major Payne" but I couldn't remember how to spell it because I was so young. I instead used Mr Pain as it was easier to spell and sounded cool. Since then I've continued to use it but usually offline as a lot of gamers around the world also use it. It's one of the most popular gaming names in the world but I didn't know that at the time
. I have two other usernames that I use too.