big bad-wolf

having a cruel, ferocious or rapacious disposition. The Big Bad Wolf was a character in a children's story about three pigs who each build a house to be safe from the wolf. When the wolf arrives at the door of each house, he boasts, "I'll huff and I'll puff, and I'll blow your house down." The wolf blows down the first two houses that are made out of straw and sticks, and the first two pigs take refuge in the brick house built by the third pig. In some versions of the story, the wolf eats the first two pigs.