"real fan:"hey do you like ac/dc?"  twat:"yeah back in black is a great song, their my favourite band ever
an song that people use as an excuse to like ac/dc, when they haven't heard any other songs or bought their albums
""real fan:"hey do you like ac/dc?"  twat:"yeah back in black is a great song, their my favourite band ever" What is the definition of "back in black"?