The term "My Bag" was originally slang for taking responsibility for one's own actions. Somewhere in the early 90s people started saying "My bad" either because they wanted to change the verbage of the original, or because they just plain didn't understand the original meaning. "My Bag" is slang for "Baggage",ie: You take your own problems, put them in a bag and carry it on your own back. "It's on me, my fault, my problem. "My Bag" excepts and takes the burden, "My Bad" just dismisses it.
"Joe, do you need help paying for your rent this month? I know you haven't been working and would really like to help you out." said Nick. "No thanks man, that's My Bag." said Joe. "Oh, My Bad, I just thought you could use the help dude."
by garbailian September 23, 2011
Get the My Bag mug.
The term “my bag” was common from 1930 to about 1995. It means “my mistake, my fault, my apologies”. The popular term my bad is actually a 1980s mispronunciation of the term “my bag”.

My bag” was a phrase used when playing a game of spades. In the game, you would have to for-tell how many "books" or hands you would take. If you went over that number it was called a "bag". If you were playing with a partner it was a courtesy to claim your mistake by saying "My Bag".

Spades came out of the Midwestern United States in the late 1930s. It was said to have been invented by college students who enjoyed both Whist and Bridge. They were looking for a fast-paced game that was competitive and strategic. The game slowly spread to other college campuses. It didn't really take off until WWII brought so much of America's youth into the military. Because the game was portable, could be played by small groups, and could often be played in less than twenty minutes, its popularity mushroomed. You can still find the game online.

“My Bag” meaning “My Mistake” should not be confused with “Not My Bag.” meaning “Not My Thing.” or “What's Your Bag?” meaning “What's Your Problem?”

When I was in high-school in the 70s “my bag” meaning “my fault” was very common. Even though “my bad” is said to have come out in the 80s I had never heard it until sometime around 2008 or so. I can't recall the last time I heard the term “My bag”.
My bag or My bad, I thought I sent you an invitation.
by rawmlkmyke January 7, 2018
Get the My Bag mug.
To not be of someone's 'thing,' interest, taste or expertise. A polite way of saying that you have no interest whatsoever in what is being suggested or discussed. Can also be used in admitting ignorance of a certain subject.

Compare 'bag' to cup of tea. Perhaps derived from 'bag of tea.'
1. Guy: Want to come to the body building show with me this Sunday?
Gal: Uh, no, that's not my bag.

2. Fellow: Do you know any jazz clubs around here?
Buddy: Sorry, that's not really my bag.
by audiomasochist October 26, 2013
Get the Not My Bag mug.
The act of becoming one with whatever task you are trying to achieve. One dimensional. Tunnel vision. Grindin'. One who is "in my bag" has forgotten about all else except for the current moment. When you are in your bag you are unstoppable, you will shred anything and everything.
I was in my bag when I got 30 headshots last night!
by SilkyMeatloaf July 27, 2019
Get the in my bag mug.
the act of being in your own world; focused; being in the zone; on your grind
I be in my bag when i get in the booth.

I got an exam coming up, it's time to go in my bag and study.
by Rashine May 18, 2008
Get the in my bag mug.
be focased, you on your shit at the moment,
you making things happen.
yeo i got all these bitties, im in my bag.

yeo im gettin that money, im in my fuckin bag.
by will beezy September 7, 2008
Get the in my bag mug.
When you're sad and are deep down in the feels usually about a relationship
Person 1: why have you been listening to Drake a lot lately?
Person 2: I've just been in my bag since my breakup
by Drake drake January 7, 2016
Get the In my bag mug.