Have egg on one's face 丢脸，出丑
The CEO really had egg on his face after he went on stage to demonstrate the new product and couldn't get it to work.
Put all your eggs in one basket
She has all her eggs in one basket with this merger deal. If it doesn't work out, I doubt her company can survive.
Can't boil an egg
We should eat something beforehand because my brother's making dinner, and he can't boil an egg.
Kill the goose that lays the golden egg
Firing him is like killing the goose that lays the golden egg. He’s the best employee in the company.