0 nervous and worried, especially because you are frightened or guilty: --
Stop watching him; it makes him jumpy.
2 nervous or uncertain about what might happen in the future: --
Ajoba was a scientific pioneer, one who showed us that leopards are not jumpy, nervous animals, lashing out at humans at the slightest provocation.
The latter is very jumpy.
The keepers, or the ringleaders if you like, have become jumpy and short-tempered and prone to disagree with each other, the crowd restless and hungry for stronger doses of sensation.
They are jumpy and cannot contain themselves.
That will make young soldiers edgy and jumpy, especially on dark nights, if they think that unauthorised people are in the base.
This very soon attracts attention, particularly where tenants are somewhat jumpy about landlords' intentions.
If we have a man in command who is jittery and jumpy, the damage may be done; and then it may be too late.
We have no cause to be nervy or jumpy.