ふみんふきゅう 不眠不休 LinksSentence search for 不眠不休Sentence search for ふみんふきゅうKanji details for 不, 眠 and 休Edit in JMdict Noun, Noun which may take the genitive case particle 'no'1. no sleep or rest; working day and nightYojijukugo (four character compound) Discussions Log in to talk about this word.