irresponsibly

adv

1. In an irresponsible manner; so as to be irresponsible.

   “He had frequent fits of melancholy in which he declared that he was neither fish nor flesh nor good red herring. His was neither an irresponsibly contemplative nature nor a sturdily practical one, and he was for ever looking in vain for the uses of the things that please and the charm of the things that sustain.”