I'm going to get rid of my brother's son.
Why would you want to get rid of your nephew?
The bloody brat eats too much
That seems extreme. It is really bad to try to get out of your responsibility if you agreed to watch your brother's son.
I'm going to do it anyway, it won't be that hard.
If you are having problems caring for your nephew you should talk to his parents about it instead of neglecting the child. If they won't listen or can't help, reach out to another family member for support.