Entry
  1. Adverb taking the 'to' particle, Suru verb

    carefree; relaxed; comfortable; at one's ease

    Onomatopoeic or mimetic word

    みんな忙しくしているのに、そんなところでノウノウと休憩してるんじゃないよ。
    You can't just lounge around like that while everybody else is so busy.

Also written ノウノウ

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