Irresponsible teachers and professors constitute the worst of this whole gang, and I am ashamed to say that several of them are on the faculty of our great State University!
As a result he had been given an excellent job in a commission-house, and he was making a salary on which he could marry, and denouncing irresponsible reporters who wrote stories criticizing commission-houses without knowing what they were talking about.
There are no more uses of "irresponsible" in the book.
Show samples from other sources
After much passing around of money Cousin Joshua was moved across the tracks and placed in state accommodations for the irresponsible, where he remained for the rest of his days.
Harper Lee -- Go Set a Watchman
"The fact of the matter is, we’ve been irresponsible," Marybeth continues.