to change at once on seeing sth different (idiom); loving fads and novelty
never satisfied with what one has
Definitions (粵典–words.hk)
動詞
見到更新或更好嘅嘢就想要,拋棄舊嗰樣 to change one's mind when one sees something new or better; literally: to wish to change after seeing something different
愛一個人要專一,唔應該見異思遷。
爱一个人要专一,唔应该见异思迁。
oi3 jat1 go3 jan4 jiu3 zyun1 jat1, m4 jing1 goi1 gin3 ji6 si1 cin1. We should be loyal to our partner, but not to be fickle.
Definitions (Wiktionary)
phrase, idiomatic
to change one's mind the moment one sees something new