Meaning of the word "eyes are out on stalks" in English

What does "eyes are out on stalks" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

eyes are out on stalks

US /aɪz ɑr aʊt ɑn stɔks/
UK /aɪz ɑːr aʊt ɒn stɔːks/
"eyes are out on stalks" picture

Idiom

to be extremely surprised or shocked, often with one's eyes wide open

Example:
When she saw the huge diamond ring, her eyes were out on stalks.
The children's eyes were out on stalks when they saw all the presents under the tree.