|Origin:||Perhaps from Old Norse skjota 'to shoot'|
an animal, especially a horse, that is skittish gets excited or frightened very easily
a person who is skittish is not very serious, and their feelings, behaviour, and opinions keep changing
if people who buy shares are skittish, they are nervous and worried about them dropping in value, and might sell the shares that they own because of this [= jittery]:
Some skittish Wall Street investors are staying away from the market.