What is Not Jewish?
1.
(not JEW-ish) adjective. the catch all phrase used between Yids to classify someone who is Catholic, Protestant, Baptist, Methodist, Athiest, Muslim, etc.
Rose: So, tell me about your lovely friend Sue.
Eugene: What's to tell?
Rose: Well, does she go to Beth Israel Temple?
Eugene: No. She's not Jewish.
Rose: Oy. My heart.