A short-lived craze is a phenomenon that quickly gains popularity and then fades away just as quickly. The term can be broken down into three parts: FAD (3 letters), FEVER (5 letters), and MANIA (5 letters). A FAD is a trend that is popular for a short period of time, often involving a specific product or activity. A FEVER is an intense enthusiasm or excitement about something. MANIA is an excessive enthusiasm or desire for something. All three terms describe a short-lived craze, which is a phenomenon that quickly becomes popular and then fades away.