nervy
1. Very anxious, easily distressed, or high-strung. I heard a gunshot in our neighborhood last night, and I've been horribly nervy ever since. The new intern is this nervy little mouse of a boy who leaps out of his chair if you so much as cough too loudly near him.
2. Daring or fearless; courageous. You've got to be pretty nervy to jump out of a plane and trust a little backpack to save your life. I've got to hand it to you, kid—that was a nervy move.