Noun | 1. | irresponsibleness - a form of untrustworthiness; the trait of lacking a sense of responsibility and not feeling accountable for your actions untrustiness, untrustworthiness - the trait of not deserving trust or confidence undependability, undependableness, unreliability, unreliableness - the trait of not being dependable or reliable arbitrariness, flightiness, whimsicality, whimsy, whimsey, capriciousness - the trait of acting unpredictably and more from whim or caprice than from reason or judgment; "I despair at the flightiness and whimsicality of my memory" carefreeness - the trait of being without worry or responsibility responsibleness, responsibility - a form of trustworthiness; the trait of being answerable to someone for something or being responsible for one's conduct; "he holds a position of great responsibility" |