Definition
To strive to own the same expensive items and engage in the same activities as one's friends or neighbors, often driven by a concern of appearing socially inferior.
They are always spending a lot of money on new cars just to keep up with the Joneses.
They bought a bigger house; I think they are just trying to keep up with the Joneses.
He always wants the latest phone, just to keep up with the Joneses and not fall behind.