When you want it to be painfully obvious that a thing means something of importance but don’t want to say it outright while still giving one the ability to find out
Devan: yo what’s good Alex?
Alex: yo I got you a date for tonight
Devan: for real?
Alex: yeah man don’t stress on it tho
Devan: *sweating profusely* yeah man this ain’t nothin don’t worry about it
Dude, I can’t believe someone stole your Mitsubishi? Who did it? Brug ain’t me
As phrase used by the one and only Adlina Cedillo-Silva usually used to make clear or prove a point.
Girl tried to shake her ass but was flat”oh no baby that ain’t going to work”.
A cleaner version of telling someone "HELL NAW"
Teacher: "Hey would you mind partnering up with Dylan for this assignment?"
Me: "Nah that ain’t gone work"