Irresponsible

a.	1.	Not responsible; not liable or able to answer for consequences; innocent.
	2.	Not to be trusted; unreliable; lacking a proper sense of responsibility.

Adj.

1.

irresponsible - showing lack of care for consequences; "behaved like an irresponsible idiot"; "hasty and irresponsible action" Antonyms: responsible - worthy of or requiring responsibility or trust; or held accountable; "a responsible adult"; "responsible journalism"; "a responsible position"; "the captain is responsible for the ship's safety"; "the cabinet is responsible to the parliament"

adrift, afloat, alternating, amorphous, capricious, carefree, careless, changeable, changeful, chartered, desultory, deviable, devil-may-care, disobedient, dizzy, eccentric, erratic, excepted, excused, exempt, exempted, fast and loose, favored, feckless, fickle, fitful, flickering, flighty, flitting, fluctuating, fly-by-night, freakish, giddy, headstrong, heady, immune, impetuous, impulsive, incautious, inconsistent, inconstant, indecisive, ineffectual, infirm, insubordinate, irregular, irresolute, lawless, let off, licensed, licentious, mazy, mercurial, moody, mutinous, permitted, privileged, rambling, rampant, rash, reckless, reinless, released, restless, roving, scatterbrained, self-willed, shapeless, shifting, shifty, shuffling, spared, spasmodic, spineless, trustless, unaccountable, unanswerable, unbridled, uncertain, unchecked, uncontrolled, uncurbed, undependable, undisciplined, unfaithworthy, unfixed, ungoverned, unliable, unpredictable, unreined, unreliable, unrestrained, unruly, unsettled, unstable, unstable as water, unstaid, unsteadfast, unsteady, unsubject, unsure, untrustworthy, untrusty, vacillating, vagrant, variable, vicissitudinary, vicissitudinous, volatile, wandering, wanton, wavering, wavery, wavy, wayward, weak, whimsical, wild, wildcat, willful, wishy-washy