1888, W. B. Yeats, “King Gall” in uncredited editor, Poems and Ballads of Young Ireland, Dublin: M.H. Gill, p. 43,
They will not hush, the leaves a-flutter round me—the beech leaves old
Filled or covered (with something that flutters).
In a state of tremulous excitement, anticipation or confusion.
1930, Moss Hart and George S. Kaufman, Once in a Lifetime, Act III, in Burns Mantle (ed.), The Best Plays of 1930-31, New York: Dodd, Mead, 1931, p. 144,
[…] in breaks Susan Walker a little more aflutter than usual. The picture is wonderful. Seeing her name in lights is wonderful. Everything is just wonderful.