Chills and fever fit is a term used to describe the symptoms of a condition known as AGUE, which is a four-letter word. AGUE is an old-fashioned term for malaria, a serious infectious disease caused by parasites that are transmitted through the bite of an infected mosquito. Symptoms of AGUE include chills, fever, sweating, headaches, and fatigue. It is important to seek medical attention if you experience any of these symptoms.