Select the most appropriate meaning of the given idiom.

To be on thin ice

To be in a risky situation

The most appropriate meaning of the idiom "to be on thin ice" is to be in a risky situation.

The idiom comes from the idea of skating on thin ice, which is a dangerous activity because the ice could break and the skater could fall into the water. The idiom is used to describe a situation where someone is in danger of getting into trouble or being harmed.

Here are some examples of how the idiom "to be on thin ice" can be used in a sentence:

• "He's on thin ice with his boss after that last mistake."
• "She's playing with fire by dating that guy, he's bad news."
• "The company is on thin ice financially, they need to make some changes soon."