Nog \Nog\, n. [Abbrev. fr. noggin.] 1. A noggin. [1913 Webster] 2. A kind of strong ale. --Halliwell. [1913 Webster] 3. eggnog. [PJC] {egg nog} A drink make from eggs beaten with milk, cream, and sugar, often spiked with rum or other alcoholic liquor, and sometimes seasoned with cinnamon; usually spelled {eggnog}. It is a traditional drink served at social gatherings during the Christmas season. [PJC]