My Bad

What is with the saying, "my bad?"
Was it "invented" by the same people who can't keep their baggy, prison pants on?
"Your bad what?" You didn't finish the sentence! This is grammatically incorrect!

Even if you wanted to keep the word "bad," and direct it toward yourself, you would have to say, "I'm bad!"
Why do the dumbest things, made-up by dumb people catch-on? Are "we" really that pathetic that "we" all need to speak like morons and have pants that don't stay on???

Count me out. I might be getting old, but my pants fit and I don't sound like an idiot.

-Cutris out!