Originally posted by FreakyKBH
Forgive my ignorance, but what does the title refer to, exactly? I've never heard the expression before and even after hearing of the premise of the series, the title still puzzles me.
I had to check this. Found this interesting note -
The credits feature symbols of chemical elements from the Periodic Table in green (for example, the symbols Br and Ba for bromine and barium in Breaking Bad). The credits at the beginning of the show usually continue this, with cast members' names usually including one chemical element symbol if appropriate.
The opening credits also feature the formula C10H15N which is repeated several times in each frame that it appears. This is the molecular formula for methamphetamine, it indicates that each molecule contains 10 carbon atoms, 15 hydrogen atoms and one nitrogen atom.
The number 149.24 is also repeated in the introduction, which is the molecular mass of the methamphetamine compound.