I use the phrase "fairytales with bite" as a lot of my flash fiction work, in particular, is set in a fantasy world and I use a lot of irony. There really is a bite to a lot of what I write. I like quirky writing - my own and that of others! I also use twist endings a lot and there can be a great deal of bite behind those. I am, after all, looking to make an impact with my stories.
My catchphrase is also a reaction against those who think fairytales are twee. I know I've touched on this topic before, here and on other blogs I'm involved in, but fairytales can show up human nature for what it is and are anything but twee as a result. Think of all the tales where kindness is rewarded and/or greed is punished. What happens to the villains in lot of fairytales is anything but twee!
Of course, with the Big Bad Wolf, you could argue the fairytale with bite is literal here!