Free will means that you own your action so much that if you could go back in time you may do it or do something else. You are free to go either way. This is called indeterminism.

Some say we are programmed by psychological forces that we picked up over time unawares and these make the "decisions" we think we make. This view is called determinism.
Compatiblism is just a redefinition of free will - if you don't feel forced you are free. It can be safely ignored as semantics.

The disproof from consciousness
The existence of free will can be undeniably refuted. To be responsible for an action, I have to know what I am doing the very moment I am doing it. But I can only concentrate on one thing at a time. The moment I will something it is one thought in my mind that makes me do it. I am not conscious of my motives so I do not know what I am doing in that particular moment. I cannot be responsible for what I do therefore determinism is true.

Everyone who has examined their conscience is aware of this truth that there is no free will because that job requires examination of whether or not you were conscious of what you were doing the moment you acted badly. Even those who do a less thorough job would realise that at the very least they don’t know if they have got it or not. Nobody can say we do evil freely and fail to be unfair.

Hume said that when he looked for his self or what made him a person he could find nothing but only a perception. But you have to have a self before you can have perception for there has to be something to have the perception. Hume’s argument that there was no self but only a bundle of perceptions would eliminate free will if it were valid.

Free will is one hundred percent disproved. There is no question about it.