puppy love
青春期的初戀，通常是不成熟且短暫的戀愛
口語·形容青澀戀情
英文釋義
to describe the intense but shallow romantic feelings that often occur between young people
例句
Their romance is just puppy love; it probably won't last through summer.
典故來源
比喻像小狗般熱情但短暫的依戀，常見于青少年初戀。