Flutters meaning : The act of fluttering; quick and irregular motion. A state of agitation. An abnormal rapid pulsation of the heart. A small bet or risky investment. A hasty game of cards or similar. (audio) The rapid variation of signal parameters, such as amplitude, phase, and frequency. To flap or wave quickly but irregularly. Of a winged animal: to flap the wings without flying; to fly with a light flapping of the wings. To cause something to flap. To drive into disorder; to throw into confusion. To be in a state of agitation or uncertainty. To be frivolous.