I'm going to give my father the finger
Why flip your father the bird?
First of all, I think it's a cool thing to just flip a big middle finger to someone's face
I think it is rude to show someone your middle finger. That is your father and you should respect him. Doing something like that just for fun is mean and cruel.
Fuck that man. It's my life, I don't care what people think about me.
You should care what those close to you think about you. If you keep offending and annoying them, then they may not want to associate with you anymore.