From Longman Dictionary of Contemporary Englishcertifiablecer‧ti‧fi‧ab‧le /ˈsɜːtəfaɪəbəl $ ˌsɜːrtəˈfaɪ-/ adjective 1 informalCRAZY crazy, especially in a way that is dangerous If you ask me, that man is certifiable.2 especially American English definitely a particular thing The guy’s a certifiable megastar.3 especially American EnglishAPPROVE good enough to be officially approved grade A certifiable beef
Examples from the Corpus
certifiable• He would undoubtedly consider her certifiable.• Not normal, but not certifiable.• There are times when you could send me away and they'd say I was certifiable.• "The Silence of the Lambs" was a certifiable hit.• It was from ridiculous to totally certifiable madness.• As a singer, Mr Jackson is a certifiable megastar.• Even a certifiable Moon rock that makes its own way to the Earth will be called a meteorite.• You'd have to be certifiable to do a bungee jump.• Soon, the talk-show producer decides she has not found Mr Right but a certifiable wacko. 