a.

1. 跳动的；急遽变化的
2. 神经质的；提心吊胆的[（+about）]
   We felt jumpy after she told us the house was haunted.

   在她告诉我们这屋子闹鬼之后，我们就觉得神经兮兮的。

   I knew that something was going to happen, and I was very jumpy.

   我知道要出事了，心里很紧张。

adj.

1. anxious and uneasy.
2. stopping and starting abruptly.