Big bad wolf thing is related to his notorious finding for his killing and eating 3 little pigs in this farity tale, but what does "thing" mean here? Can you guess? stuff or story or job or something? "Thing" has so many meanings, so it's hard to tranlsate.
ex).The true story of 3 little pigs!
.....I'm the wolf. Alexander T.wolf. You can call me Al.
I don't know how this whole Big Bad wolf thing got started, but it's all wrong.
"This whole Big Bad Wolf thing" is the widespread (mis)conception of his being a Big Bad Wolf.