A person who is Jewish or better Jew-ISH by birth(If you have a Jewish mother then your Jewish thats just how it is) but are also an Atheist.
Some retard: NO YOUR NOT JEWISH IF YOUR ATHEIST
Me: Yea I am I'm an Atheist Jew
Someone who is Israeli/Hebrew but doesnt believe in god. They Still practice the parts of judaism that benefits them, such as a barmitspha to get gifts. etc.
Otherwise, a poser Jew.
"I dont believe in god, i just participate in all the jewish practices for the gifts. Im an Atheist Jew"
"hah your a poser jew"