A malted beverage (hence not a vodka
like other Smirnoff products) that one is forced to drink when presented, usually in some ceremonious fashion at a large gathering, in an act called "Icing." When
iced, the drinker is required to get on one knee and
chug the entire bottle, despite occasional jeers, jokes, discouragement and/or encouragement from onlookers.
Jack snuck a Smirnoff
Ice into everyone's Secret Santa gift at the Christmas
party. When guests opened their presents at the end, they all had to get on their
knees one by one and drink theirs. One of the gifts was a drinking hat, which the recipient used to consume his.