earworm
一首难以忘怀的歌曲或旋律，在人的头脑中反复出现
口语·形容挥之不去的歌曲旋律
英文释义
catchy song or tune that gets stuck in one's head and is hard to get rid of
例句
That pop song is such an earworm; I've been humming it all day without even realizing.
典故来源
来自德语“Ohrwurm”，字面意为“耳朵虫”，比喻旋律像虫子一样钻进大脑难以摆脱。