{s} lacking a sense of responsibility, unreliable, careless; incompetent, unfit to assume responsibility (Law); not accountable to a higher authority, independent
disapproval If you describe someone as irresponsible, you are criticizing them because they do things without properly considering their possible consequences. I felt that it was irresponsible to advocate the legalisation of drugs responsible + irresponsibly ir·re·spon·sibly They have behaved irresponsibly. + irresponsibility ir·re·spon·sibil·ity the irresponsibility of people who advocate such destruction to our environment. doing careless things without thinking or worrying about the possible bad results responsible totally/highly/completely etc irresponsible