From Longman Dictionary of Contemporary Englishextraordinaireex‧traor‧di‧naire /ɪkˌstrɔːdəˈneə $ -ˌstrɔːrdnˈer/ adjective [only after noun] used, often humorously, to describe someone who is very good at doing somethinggardener/cakemaker/chef etc extraordinaire
Examples from the Corpus
extraordinaire• a violin player extraordinaireOrigin extraordinaire (1900-2000) French “extraordinary” 