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.
Mr Goldblatt: I am Straight up Jew, ach!