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To be completely embracing Judiasm, and consider oneself as a practicing Jew. Must have strong lineage, too.

A 'Straight up Jew' must be completely practicing, and not jew-ish.

A Straight up Jew would do the following:
1)Celebrate Haunnakah, with the candles
2)Study the Torah
3)Not celebrate Christmas
4)Have a jewish mother
5)Know how to prounounce those tricky "hhhlaahck" sounds
6)Go to temple every week.
Hannah: Mr Goldblatt, are you a Straight up Jew, or are you Jew-ish?
Mr Goldblatt: I am Straight up Jew, ach!
by g-diggity February 24, 2008