Meaning of the word "it's all fun and games until someone loses an eye" in English

What does "it's all fun and games until someone loses an eye" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

it's all fun and games until someone loses an eye

US /ɪts ɔːl fʌn ænd ɡeɪmz ʌnˈtɪl ˈsʌmwʌn ˈluːzɪz æn aɪ/
UK /ɪts ɔːl fʌn ənd ɡeɪmz ʌnˈtɪl ˈsʌmwʌn ˈluːzɪz ən aɪ/
"it's all fun and games until someone loses an eye" picture

Idiom

used to say that a situation that is currently enjoyable or lighthearted may soon become serious, dangerous, or have negative consequences

Example:
They were racing their bikes in the street, but it's all fun and games until someone loses an eye.
Stop throwing those rocks; it's all fun and games until someone loses an eye.