(or yiddish kup, with cup or kup meaning head) Jewish wits, competence, acumen, etc. The opposite of the pejorative "goyische kup," with goyische meaning non-Jewish.
They defeated larger, more powerful armies, and created a technologically sophisticated, exuberantly democratic state.
How did they succeed? Perhaps it was the hand of God. Perhaps it was Yiddish kup (yiddish cup). Or perhaps it was what Golda Meir described as the secret weapon of Israeli survival: ein briera, they had no choice.
--Rabbi Nachum Braverman, Jewish World magazine, 4/1/01