I. “+ adjective
Etymology: in- (I) + responsible
: not responsible: as
a. : not required to answer to some higher authority : not liable to be called into question : subject to no oversight or control
shall the planning be done by some irresponsible dictatorship or by democratic representatives whose acts are subject to discussion and criticism — M.R.Cohen
the state is irresponsible and exempt from all ordinary controls
b. : not based on sound reasoned considerations
irresponsible optimism
irresponsible dreams
especially : uttered without regard to truth, propriety, or fairness
irresponsible gossip
these irresponsible charges
c.
(1) : lacking a proper or adequate sense of responsibility
irresponsible jacks-in-office
(2) : mentally inadequate to bear responsibility in an acceptable or normal manner
the mother … was finally declared irresponsible and of too low intelligence to care for her large brood of children — Eda & Lawrence LeShan
d. : unprepared or unwilling to meet financial responsibilities
financially irresponsible drivers
II. noun
: one who is irresponsible