What is God?

[ErGingerbreadMandude]

You can believe in a god, and not be a theist. If you believe in the abrahamic god, you're a theist. If you believe in a deistic god, you aren't.

Frankly,i don't see much distinction between "I don't know" and "Because god.",both imply a lack of knowledge through different means.

So i can believe in a deistic god and not be a theist? Just to be clear,a deistic god is used to explain what cannot be explained,right?
If yes,what are the people that believe in a deistic god called?

Finally,a person believing in a deistic god would respond with a "Because god." argument to explain what cannot be explained,am i right?

Edit: Sorry,one more doubt,Am i not a theist if i believe in the islamic god?