1. reflecting the idea that someone else's life/possessions is/are better than yours
they say the grass is always greener on the other side
The expression 'the grass is always greener on the other side' refers to the assumption that the position other people are in or the things that they have are better than yours. This idiom is used to question envying what other people have. The implication is that appearances can be deceptive, and while other peoples positions and possessions may seem attractive from your perspective - you may not be getting the full picture or be exposed to the negatives other people are encountering or experiencing. You can imagine a cow trapped in a field who believes the grass is better in the next field when, in fact, it is no better or perhaps even worse.