I spent a Saturday night a few weeks ago with my fiancé and friends at a new restaurant off the beaten path in South Williamsburg. Pronounced “sh’eeksa,” According to the restaurant's chef/owner, Jason Marcus, Xixa is an alternate spelling for the word Shiksa ("non-Jewish woman" in Yiddish). Marcus, who is Jewish and also owns Traif ("not kosher" in Yiddish) a few doors down on the same block, named this restaurant for his co-owner and non-Jewish girlfriend, Heather Heuser....