: not having or showing maturity or good judgment : not responsible
He's too irresponsible to keep a job for more than a week.
She made irresponsible comments that helped cause the riot.
It would be irresponsible to ignore the threats.
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“Irresponsible.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/irresponsible. Accessed 18 Jun. 2026.
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