"flightiest" in the adjective sense
1. flighty, flyaway, head-in-the-clouds, scatterbrained
guided by whim and fancy
"flighty young girls"
2. skittish, flighty, spooky, nervous
unpredictably excitable (especially of horses)
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License