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 mug
Get a Not My Bag mug for your sister Yasemin.
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 merch
Get the in my bag neck gaiter and 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 26, 2019
Get the mug
Get a in my bag mug for your sister-in-law Jovana.
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 07, 2008
Get the mug
Get a in my bag mug for your sister Riley.
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 07, 2016
Get the mug
Get a In my bag mug for your daughter-in-law Jovana.
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 mug
Get a My Bag mug for your papa José.