Friends who associate with one another solely for the purpose of eating, drinking, and seeking pleasure.

他整天和那些酒肉朋友混在一起，从不干正事。

A person who is a friend only when circumstances are easy and pleasant, and who cannot be relied upon in times of trouble.

直到他遇到困难时，才发现平时围在身边的全是酒肉朋友。