I'm sure I've heard it at work and probably also in some TV shows.
I thought of that possibility too. However, stretch or not, I haven't heard "No bad" in that sense, only "My bad". !No worries! is quite common!I haven't heard it, but I don't totally discount the possibility that it could exist. From "my bad" to "no bad" isn't such a stretch.
Where were they from, and when was this, if you don't mind my asking?I'm usually working closely with engineering teams from my customers and they usually are a younger crowd in their twenties and engineers do tend to use casual speech once you get to know them. It may just have been a "cool phrase" that was used for a while, but within context the meaning was perfectly clear.
That was some time from the late nineties roughly until the virus hit in 2020. If I exclude those countries that show a big variance in the level of English like India, Singapore and the Philippines, that leaves only Canada, the US, the UK and Australia as native English countries. Even though I have not been to every single region in those countries, I cannot exclude a specific region because we had local service engineers from all over the place and I've met most of them at least once a year, and then I also supported them on the phone quite often.Where were they from, and when was this, if you don't mind my asking?