eyes are out on stalks
US /aɪz ɑr aʊt ɑn stɔks/
UK /aɪz ɑr aʊt ɑn stɔks/

1.
olhos esbugalhados, estar muito surpreso
to be extremely surprised or shocked, often with one's eyes wide open
:
•
When she saw the huge diamond ring, her eyes were out on stalks.
Quando ela viu o enorme anel de diamante, os olhos dela estavam esbugalhados.
•
The children's eyes were out on stalks when they saw all the presents under the tree.
Os olhos das crianças estavam esbugalhados quando viram todos os presentes debaixo da árvore.