15
I understand it to mean "error" or "screw-up" or "bad behavior". An abbreviated informal apology.

While some believe it to be a misinterpretation of the older phrase My Bag it is clearly it's own slang with its own origins and meaning.
While playing pick up basketball a player who just made a mistake would say "My bad"
by AFAN July 13, 2005
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16
Another way to apologize or say I'm sorry.
"I got charged"
"Oh shit, my bad"
is the same as
"I got charged"
"Oh shit, I'm sorry"
by LILR1 October 14, 2008
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17
My bad. I did not mean to step on your toe.
by Light Joker December 19, 2004
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18
sry for doin sumthin hurtful and wrong
My-bad emily for the dirty defintion
by leo beale December 30, 2004
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19
My bad, officer! I didn't mean to bust a cap! for real, yo
by Anonymous August 21, 2003
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20
This phrase actually came from bad spelling and the internet. Lazy spellers who couldn't be bothered with an apostrophe said:

"your bad" instead of "you're bad", the latter being correct (a contraction for YOU ARE BAD), but the former being more common.

The proper response to "your bad" is OH, it's MY BAD? The "bad" being possessive.
I ditched school today. My bad." from the original "oh, you ditched today? Your bad.
by badnursey January 14, 2011
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21
A term used to tell someone that you made a mistake and apologize at the same time. Originally Used Mostly by African Americans but over the years it has become a more mainstream term; so it is not uncommon any more to hear anyone else (possibly in the professional world too) say it to admit to making a mistake.
Teacher: The answer to #1 is B (then he show his work)
Student: Sir I believe you are wrong. (student explains their answer)
Teacher: My Bad you were right and I was wrong, sorry for the misunderstanding
by Yourname2 April 02, 2007
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