flutter
flut-ter
noun
A rapid, irregular movement, or a feeling of slight excitement or nervousness.
"She felt a flutter of excitement in her chest."
verb
To move or cause to move with light, rapid, irregular motions.
"The flag fluttered in the gentle breeze."
Thesaurus
Synonyms: flit, fleet, dart, waver, flitter, flicker, quiver, to-do, hoo-ha, hurly burly, kerfuffle, disturbance