Tullamore Dew was a type of beverage, a variety of Irish whiskey.
History and specifics[]
Miles O'Brien was fond of Tullamore Dew. While on an away team in the company of some Tiffnaki, O'Brien found himself wishing for a bottle of this quality of whiskey while doing some rough hiking. Later, when Benjamin Sisko informed the team they'd be engaging in military action, O'Brien again wished for a bottle. (DS9 - Rebels novel: The Conquered)