auf großem Fuß leben

You use this phrase like a normal verb construction. The core is leben. You can conjugate it for any person. For example, Er lebt auf großem Fuß. You can also use it in the past tense. Sie hat schon immer auf großem Fuß gelebt. It fits perfectly when discussing budgets or lifestyles. It is a very visual way to describe someone's financial habits.

Use it when gossiping about a rich neighbor. Use it when discussing a celebrity's wild spending habits. It is great for describing a friend who suddenly got a promotion. You might use it at a dinner party. It works well when comparing different standards of living. It is a vivid alternative to just saying someone is 'rich'.

Do not use it in a strictly professional bank report. It is a bit too colorful for formal financial documents. Avoid using it if someone is genuinely struggling with money. It can sound mocking if used in the wrong context. Do not use it to describe someone who is simply comfortable. It is reserved for those who are clearly over-the-top. It is not a phrase for modest or frugal people.

This idiom dates back to the Middle Ages. Back then, noblemen wore shoes with very long, pointed toes. These were called 'Poulaines' or 'Schnabelschuhe'. The longer the toe, the higher your social status. Only the very wealthy could afford such impractical footwear. If you had a 'big foot' (a long shoe), you were clearly powerful. Today, the shoes are gone, but the 'big foot' remains a symbol of wealth.

You might hear people say someone is 'living beyond their means'. In German, that is über seine Verhältnisse leben. While similar, auf großem Fuß leben is more about the outward display. You can also say someone is a Prasser (a big spender). But the 'big foot' version is much more common in daily conversation. It adds a touch of historical flair to your German.