red light fever n. 1. excitement or unusual behavior when confronting a recording device, specifically: nervousness, giddiness, or talkativeness in front of a live microphone or video camera; the desiring or seeking of media attention. 2. in vehicles, a tendency to have a false start during a race; to run a red light. Editorial Note: Television cameras and radio microphones almost always have a light on them or nearby that indicates “recording” or “on the air.” (source: Double-Tongued Dictionary)