It's a somewhat uncommon phrase, but it carries a strong and positive meaning. It symbolizes:
* Power and strength: Lions are often associated with strength, courage, and leadership.
* Prosperity and fortune: "Fu" (富) means wealth and prosperity.
* Good luck: The combination of these two symbols suggests good luck and fortune.
It's likely used in situations where you want to emphasize the positive aspects of a person or a situation, particularly related to power, wealth, and good fortune.