Thought to be taken from the normal term in video games for (in most cases) being invincible and usually have most of any skill or attacks unlocked, any magic held be to the max or unlimited, and ammo to the max or unlimited. The term of coarse is god Mode, a person such as this is taken god moding into a place it is frowned upon, god moder.
God ModeR: *Rips off skin, showing he is de terminator and the blade breaks* I AM INVINCIBLE!
Howler Silver: ..damnit, forget this I am leaving..
God Moder: YES! RUN YOU N00B! YOU COWARD!
Godmoder fred: luckily Fred is half pheonix, able to return to life
normal player: For the love of God, stop it...stop it now, I can't take it anymore...too much godmoding....KILL ME NOW!