aflutter

adjective3

1. •
   Fluttering.

   • I can hear / Your heart a-flutter over the snow-hills — 1856
2. •
   In a state of tremulous excitement, anticipation or confusion.

   • […] she rose, all a-flutter within, it is true, but with a face as nearly sedate as the inborn witchery of her eyes would allow. — 1880
3. •
   Filled or covered (with something that flutters).

   • The day being warm and sultry, the balcony was all aflutter with the feather fans of the ladies of the family and their attendants, — 1891