Carefree; leisurely; living or acting at ease with little worry. Can sometimes imply living without proper concern or responsibility.
彼はのうのうと毎日テレビばかり見ている。
He spends his days carefree, watching TV all the time.
戦争の被害者がいるのに、あの政治家はのうのうとしている。
Even though there are war victims, that politician remains comfortably unconcerned.
のうのうと暮らす友人を見て、少し羨ましく思った。
Seeing a friend live so carefree, I felt a bit envious.