(n) a form of untrustworthiness; the trait of lacking a sense of responsibility and not feeling accountable for your actions, Syn. irresponsibleness, Ant. responsibility, responsibleness
a. [ Pref. ir- not + responsible: cf. F. irresponsable. ] 1. Not responsible; not liable or able to answer for consequences; innocent. [ 1913 Webster ]
2. Not to be trusted; unreliable; lacking a proper sense of responsibility. [ 1913 Webster ]
[さんむしゅぎ, sanmushugi] (n) the "three noes principle" of no drive (indolence), no interest (indifference), and no sense of responsibility (irresponsibility), the term describing the temperament of the Japanese youth of the 1970s