When it comes to expressing the idea of living from one paycheck to another or being financially unstable, there are many different synonyms for the phrase "lives from hand to mouth." Some of these include being paycheck to paycheck, living from one day to the next, living precariously, financially vulnerable, having no financial cushion, living on the edge, or scraping by. All of these phrases portray the same idea of financial insecurity and instability. However, regardless of how it's expressed, the truth is that many people around the world struggle with this issue, and it's important to offer support and resources to help those who find themselves in this situation.