earworm
一首難以忘懷的歌曲或旋律，在人的頭腦中反復出現
口語·形容揮之不去的歌曲旋律
英文釋義
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.
典故來源
來自德語“Ohrwurm”，字面意為“耳朵蟲”，比喻旋律像蟲子一樣鉆進大腦難以擺脫。