Meaning of the word "jaw drops" in English

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

jaw drops

US /dʒɑː drɑps/
UK /dʒɔː drɒps/

Idiom

to be extremely surprised or shocked by something

Example:
When she announced her engagement, everyone's jaw dropped.
My jaw dropped when I saw the price of the new car.