the appearance of unity, but divided at heart (idiom); seeming harmony belies underlying disagreement
Definitions (粵典–words.hk)
形容詞
雙方表面關係和好,同意對方,但係實際有分歧,唔再團結 (of two parties) to seemingly agree but actually be at variance
佢兩夫婦貌合神離噉,一定有問題。
佢两夫妇貌合神离噉,一定有问题。
keoi5 loeng5 fu1 fu5 maau6 hap6 san4 lei4 gam2, jat1 ding6 jau5 man6 tai4. The couple seemingly agree but are actually at variance, they must have problems.
Definitions (Wiktionary)
phrase, idiomatic
to appear united or intimate but in reality have different thoughts