Jewish American Princess. Usually used in the context to describe a spoiled, rich brat. Can also be used to describe a girl, usually popular, who is a slut.
Anabelle: Omg have you seen Emma! Sheâs such a J.A.P!
Danielle: I know.
*Emma walks over*
Emma: have you seen my new golden goose shoes and my Hermès H Bracelet! Ugh love.