nonsense verse
US /ˈnɑːnsəns vɜːrs/
UK /ˈnɑːnsəns vɜːrs/

1.
ナンセンス詩, 無意味な詩
poetry that is intentionally absurd or humorous, often characterized by illogical content, made-up words, and whimsical imagery, without a clear narrative or meaning
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Edward Lear is famous for his nonsense verse, like 'The Owl and the Pussy-cat'.
エドワード・リアは「フクロウとネコ」のようなナンセンス詩で有名です。
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The children giggled at the silly rhymes and made-up words in the nonsense verse.
子供たちはナンセンス詩の中のばかげた韻や造語にクスクス笑った。