LOL, it has nothing to do with a backpack pittpanther. Some people call any bag you can carry on your back a backpack. OK, I get that, even if it is a misuse of the word backpack to me, but the 'professional' part is still something to wonder about.

That requires a definition of what 'professional' means and more importantly, what the definition of a 'non-professional' would then mean. Hilarious really.