The definition of irresponsible is not capable of handling assignments or taking responsibility.
An example of an irresponsible person is someone who constantly forgets to do her assignments.
Marked by a lack of responsibility.
Lacking a sense of responsibility; unreliable or untrustworthy.
Not liable to be called to account by a higher authority.
One who has no sense of responsibility.
One who is unlikely to be called to account by a higher authority.
Not liable to be called to account for actions.
Lacking a sense of responsibility; unreliable, shiftless, etc.
Said or done as by an irresponsible person.