irresponsible Meaning, Definition & Usage

  1. adjective showing lack of care for consequences
    • behaved like an irresponsible idiot
    • hasty and irresponsible action

WordNet

Ir`re*spon"si*ble adjective
Etymology
Pref. ir- not + responsible: cf. F. irresponsable.
Definitions
  1. Nor responsible; not liable or able to answer fro consequences; innocent.
  2. Not to be trusted; unreliable.

Webster 1913