Select the most appropriate meaning of the given Idiom: To turn-turtle

The most appropriate meaning of the idiom "to turn-turtle" is turning upside down. This idiom is derived from the fact that when a turtle is turned on its back, it is helpless and vulnerable. The idiom is often used to describe a situation that has become chaotic or disastrous.

The other possible meanings of the idiom are not as common. "To walk slowly like a turtle" is the meaning of the idiom "to creep like a turtle." "To change one's appearance" is the meaning of the idiom "to turn turtle." "Doing something with very slow speed" is not a common meaning of the idiom "to turn-turtle."