” When did the above abomination of the English language ever start?” “Roughly... 1965 “
That far back? And what’s it supposed to mean . . . “I’m bad”? Sounds like that stupid “Got game?” which, for the life of me makes no sense either?
I teach English at a vocational school here in Northeastern Ohio and have the damnedest time getting students to read, speak, and write English fluently without that kind of garbage.
My understanding of the origin of "my bad" is that it comes from street pick-up basketball games. When someone messes up on a play (passing to a teammate who wasn't ready for it, or players cutting the wrong way), the one at fault calls out "my bad", as in "that was my bad play" or "my fault".
So while it is a corruption of the language, it does at least express the positive sentiment of owning up to your own errors.