Meaning of the word "turn turtle" in English

What does "turn turtle" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

turn turtle

US /tɜrn ˈtɜrtl/
UK /tɜːn ˈtɜːtl/

Idiom

to capsize or overturn, especially of a boat or vehicle

Example:
The small boat began to turn turtle in the rough seas.
The car hit the barrier and turned turtle.