S/he did give context, it's the name of a TV show. According to Wikipedia:
Lead actor Bryan Cranston stated in an interview that "the term 'breaking bad' is a southern colloquialism and it means when someone who has taken a turn off the path of the straight and narrow, when they've gone wrong. And that could be for that day or for a lifetime."
Thank you Iskndarbey, you helped me clarify the idea. I think that by watching the series I could understand it better. I found something in Wikipedia too (which is a widely known encyclopedia in the whole world)
A double meaning may be intended, too, since "breaking" might apply to processing chemicals, breaking them down; though I've never watched the series, I know it's main character is a chemistry teacher who turns to manufacturing the illegal drug methamphetamine. As stated above, "breaking bad" would also describe the teacher's actions themselves, turning from virtuous to vile activities.