Being a major fan of Judaism and the Jewish people. This can include attending Hillel, watching Curb Your Enthusiasm, wearing a hamsa, making hammantashen for Purim, referencing the Prince of Egypt, dating someone with the last name of Cohen, Fishbein, Burnstein, Auerhahn, or Barashy, although you are but a poor Shiksa and have the last name of Smith.
Hilary is such an enjewsiast, that she spends her Friday nights drinking dessert wine and singing nigguns.