To indulge in continuous revelry and pleasure-seeking, involving singing and dancing from morning till night; to live a life of excessive indulgence in entertainment.
他年轻时沉迷于声色犬马，朝歌夜弦，最终荒废了学业
In his youth, he indulged in excessive pleasures, singing in the morning and playing string instruments at night, ultimately neglecting his studies.
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