when a jewish (most of the time girl) starts gossiping like crazy and does not watch the words that come out of the mouth. This girl "jew-ups" because that fact that she is a J.A.P. makes her gossip sound much worse.
Jewish Girl: OMG, she was like being seductive and sticking her boobs in his face and it totally was soooo unattractive...
Other Girl: Yeah, yeah, whatever.
Jewish Girl:...and then he was like you can stop that now...
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.