Definition of "irresponsible" []

• Marked by a lack of responsibility: irresponsible accusations. (adjective)
• Lacking a sense of responsibility; unreliable or untrustworthy. (adjective)
• Law Not mentally or financially fit to assume responsibility. (adjective)
• Not liable to be called to account by a higher authority. (adjective)
• One who has no sense of responsibility. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• ""What shadow of reason," he asks, "is there for doubting that such sales as are necessary and inevitable will be far more sagaciously managed by a Local Board, which the ratepayers elect _for this sole purpose_, than either by magistrates who are irresponsible and do not suffer sensibly from the public vice, or by an _irresponsible_ or _multitudinous_ Committee of Parliament?"
• "Mr. Holder also lashed out at Republican critics for using what he called "irresponsible and inflammatory rhetoric.""
• "Community this week filed a motion to dismiss what it called an irresponsible lawsuit."