What is an "immaculate inning"?

In which town is the Little League World Series held? In which city is the College World Series played? What is it called when a batter hits a single, double, triple and home run in one game? What is the nickname for striking out four times in one game? In baseball slang, what is a "Maddux"? What does the statistic WHIP measure? What does OPS combine? What does WAR stand for in baseball statistics?