Definition of "my bad" [my bad]

• My fault; mea culpa. (interjection)

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• "Instinctually, I overcompensated for my bad position on the track and slowed down."
• "I didnt expect anything to come of itI just wanted to acknowledge my bad move and congratulate her on a job well done."
• "Bex plays tour guide, winding us to the Morningside Heights neighborhood and over to the long, wide steps of Low Library at Columbia University, where we sit down behind a statue called “Alma Mater” so I can catch up on my bad habits: smokes and Cokes."