Kiddush is when you make a blessing over the wine:
ברוך אתה ײ אלהינו מלך העולם בורא פרי הגפן
Baruch atah Adonai, Elohaynu, melech ha-olam, borei p’riy ha-gafen.
Blessed are You, Lord, our God, King of the Universe, who creates the fruit of the vine.
Shabbos meals begin with the recitation of the Kiddush, which is said by the head of the household or any male over thirteen. Our Rabbis ordained that Shabbos should be sanctified with wine. Usually a silver cup holding a minimum of four ounces is reserved for this purpose. The one reciting the Kiddush drinks at least two ounces, and then distributes the rest among those who are included in the Kiddush. Kiddush is prefaced with the words, “Savri Maranan” (By your leave, gentleman) to call the family and guests to attention so that they will not have to recite the blessing for themselves. Many people, however, have the custom that all male members over the age of thirteen recite the Kiddush.