Meaning of the word "someone's jaw drops (open)" in English

What does "someone's jaw drops (open)" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

someone's jaw drops (open)

US /ˈsʌm.wʌnz dʒɔː drɑps (ˈoʊ.pən)/
UK /ˈsʌm.wʌnz dʒɔː drɑps (ˈoʊ.pən)/
"someone's jaw drops (open)" picture

Idiom

1.

used to say that someone looks very surprised or shocked

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