How do you use whatever in a sentence?

Many people today use "whatever" as a rude way of getting out of a discussion.

I hope whatever reason you may have for the use of this Word is a good one.

Whatever I say or write may not change your mind.

I don't care whatever your reasons are.

It is a power-expression in the term of showing ignorance and hence should be avoided if you manage to find another appropriate way of expressing yourself.