Ego, What is Ego? Options

As a person, I have a big ego. I want to win at all costs. I want this and that. I simply want to have it my way. I want the cake and the icing too. I am spoiled and always want to take more than I give back. Is this an example of an Ego?

My ego boost me to gain riches, health, love and many other conquests.
My ego also make new enemies, destroy and corrupt various aspects of me and my environment consciously and subconsciously.

What is EGO? What does this word means?
How do you define it? How do you keep it your slave instead of it enslaving you?
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Haven't really thought about this much but will open my big mouth and get in trouble anyways. (IMG:style_emoticons/default/rolleyes.gif)

the left hand path (satanists etc) goes to enlarge the ego to such a size that it takes over and gets you 1 with god (i may be totally off since i never really read anything about it but just heard some stuff here and there...)

and the right hand path is to basically remove the ego which will probably mean that, well, you won't exist anymore (human body hogger! (IMG:style_emoticons/default/harp.gif) ) and that will get you 1 with god.

Ofcourse we are allready 1 with god, i mean more in the sense that.. well, to put it like some silly witch series on tv, to get 'one with the source', only.. here it's a good thing. (IMG:style_emoticons/default/yahoo.gif) (nirvana anyone?)

(yes, im new and havent got much clue what i'm talking about, let the flaming begin! (IMG:style_emoticons/default/drugs.gif) )