super-bad       
adjective  informal (also superbad) uk/ˌsuː.pəˈbæd/ us/ˌsuː.pɚˈbæd/
 极坏的;比正常更差的
extremely bad or worse than normal
  Men that have high levels of this super-bad cholesterol are also at higher risk of heart disease. 体内这种极有害的胆固醇含量高的男性患心脏病的风险也更高。 
 The film isn't superbad, but it isn't supergood either.
 - More examples
 - I believe that the country is going to have a recession, but not a super-bad recession.
 - Children were asked to rate the foods on a scale from "super-good" to "super-bad".
 - Participants were told to choose the "super-bad" face if they'd had an unpleasant customer experience.
 - It seemed as if all the bad ideas had been put together into one superbad idea.