Stone cold

Pro Tip 1/3

Used to describe something that's as cold as a rock, which doesn't retain heat.

After the power outage, their entire house was stone cold.

Pro Tip 2/3

Often used to emphasize the unexpected coldness of something.

I jumped into the pool and it was stone cold!

Pro Tip 3/3

Can express disappointment, like when food that's supposed to be hot is not.

I was so hungry, but the soup arrived stone cold.