my bad

(gen.) if you say 'my bad', you admit your mistake, that you're responsible for the error (mea culpa).

Example: "Hey, you spilled your soda on my book!" / "Oops! My bad."

Dictionary: my bad
Bonus link: my bad vs. I'm sorry

Link to this idiom:

<a href="http://wordsbiz.blogspot.com/2011/09/my-bad.html">my bad</a>

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my bad, english idioms, english expressions, esl