( saying ) said about people who never seem happy with what they have and always think that other people have a better situation than they have
THE GRASS IS (ALWAYS) GREENER ON THE OTHER SIDE (OF THE FENCE)
Meaning of THE GRASS IS (ALWAYS) GREENER ON THE OTHER SIDE (OF THE FENCE) in English
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005