== What Flutter means== Flutter can refer to: Flutter on the iPhone Flutter (electronics and communication), any rapid variation of signal parameters Aeroelastic flutter, a rapid self-feeding motion, potentially destructive, excited by aerodynamic forces, in aircraft structures, control surfaces and bridge engineering Flutter (neuroscience), the qualitative perception that follows stimulating the skin with a point probe vibrating close to 40 Hz In medicine The term "heart flutter" can mean:… (More on Flutter)