beer thirty
n.— «On a recent Friday evening at Southern Illinois University, Carbondale, Kyle Field, 22, and his friends were watching television in an off-campus house when the clock struck 8:30. “Beer thirty!” someone yelled. “Let’s drink!”» —“As Young Adults Drink to Win, Marketers Join In” by Jeffrey Gettleman in Philadelphia, Pa. New York Times Oct. 16, 2005. (source: Double-Tongued Dictionary)