flutter
     n 1: the act of moving back and forth [syn: {waver}, {flicker}]
     2: abnormally rapid beating of the auricles of the heart
        (especially in a regular rhythm); can result in heart
        block
     3: a disorderly outburst or tumult; "they were amazed by the
        furious disturbance they had caused" [syn: {disturbance},
        {disruption}, {commotion}, {stir}, {hurly burly}, {to-do},
         {hoo-ha}, {hoo-hah}, {kerfuffle}]
     4: the motion made by flapping up and down [syn: {flap}, {flapping},
         {fluttering}]
     v 1: move along rapidly and lightly; skim or dart [syn: {flit}, {fleet},
           {dart}]
     2: move back and forth very rapidly; "the candle flickered"
        [syn: {flicker}, {waver}, {flitter}, {quiver}]
     3: beat rapidly; "His heart palpitated" [syn: {palpitate}]
     4: wink briefly; "bat one's eyelids" [syn: {bat}]
Source: WordNet® 2.0