Its an oxymoron.
Yeah, what are they doing, removing their skin? Taking paint off the walls?
I've thought of another thing. Trendy types using their current "buzzword", which doesn't seem to ever be just their's as all their types use it. The latest seems to be 'juxtaposition'. A while back it was 'disingenuous'
I'm thinking about people like that obnoxious Hooper family/cult who call their kids stupid names and own the 'World' fashion store. I saw one of them in the city earlier this week and he (Francis? The one who pretends not to be gay) was prancing down High Street like he had treacle running down his legs. Which he probably had.
And BTW, if dressing like he does means that you are "fashionable" then I'm going to start wargaming and get into Star Trek.