The phrase "it's fun until someone loses their life" is a cautionary expression that highlights the potential dangers or consequences associated with certain activities or behaviors. The idea behind this saying is that some activities may seem enjoyable and exciting at first, but they can turn tragic if someone gets seriously injured or loses their life.
This saying serves as a reminder to be mindful of safety and responsible decision-making. It implies that even though an activity may be thrilling or enjoyable, it's crucial to consider the potential risks involved and take necessary precautions to ensure the well-being of oneself and others.
It's a way of emphasizing that fun should not come at the expense of safety or the loss of life. Engaging in risky or dangerous activities without proper consideration for the potential consequences can lead to devastating outcomes. Thus, the saying encourages individuals to find a balance between enjoying life's experiences and being responsible for their own safety and the safety of those around them.