Flighty

a.	1.	Fleeting; swift; transient. The flighty purpose never is o'ertook, Unless the deed go with it. - Shak.
	2.	Indulging in flights, or wild and unrestrained sallies, of imagination, humor, caprice, etc.; given to disordered fancies and extravagant conduct; volatile; giddy; eccentric; slighty delirious. Proofs of my flighty and paradoxical turn of mind. - Coleridge. A harsh disciplinarian and a flighty enthusiast. - J. S. Harford.

Adj.	1.	flighty - irresponsibly frivolous; "flighty young girls" Synonyms: flyaway
	2.	flighty - absent-mindedly irresponsible; "he said I was too flighty to be a good supervisor" Synonyms: head-in-the-clouds, scatterbrained

abnormal, adrift, afloat, alternating, amorphous, bereft of reason, birdbrained, birdwitted, brainsick, buoyant, capricious, changeable, changeful, coquettish, crackbrained, cracked, crazed, crazy, daft, deluded, demented, deprived of reason, deranged, desultory, deviable, dippy, disoriented, distraught, dizzy, dotty, eccentric, effervescent, empty-headed, erratic, faddish, fanciful, fast and loose, featherbrained, fickle, fitful, flickering, flirtatious, flitting, fluctuating, fluffy, freakish, frothy, gay, hallucinated, harebrained, impetuous, impulsive, inconsistent, inconstant, indecisive, infirm, insane, irrational, irregular, irresolute, irresponsible, light, lively, loco, lunatic, mad, maddened, manic, mazed, mazy, mental, mentally deficient, mercurial, meshuggah, moody, moon-struck, non compos, non compos mentis, not all there, not right, nutty, odd, of unsound mind, off, psycho, queer, quicksilver, rambling, rattlebrained, reasonless, reckless, restless, roving, scatterbrained, screwy, senseless, shallow, shallow-headed, shallow-minded, shallow-pated, shallow-witted, shapeless, shifting, shifty, shuffling, sick, silly, skittish, spasmodic, spineless, sprightly, stark-mad, stark-staring mad, strange, superficial, tetched, thoughtless, touched, toying, unaccountable, unbalanced, uncertain, uncontrolled, undependable, undisciplined, unfixed, unhinged, unpredictable, unprofound, unreliable, unrestrained, unsane, unsettled, unsound, unstable, unstable as water, unstaid, unsteadfast, unsteady, vacillating, vagrant, variable, versatile, vicissitudinary, vicissitudinous, volatile, wandering, wanton, wavering, wavery, wavy, wayward, whimsical, wild, wishy-washy, witless