Question

The referee's stare was like ice after I fouled the other player.

Answer 1

that means he did not like you anymore, and his stare was disapproving

Answer 2

Here we have a simile. A simile is similar to a metaphor, but the only difference is that similes use the words like or as to compare or asimilate two concepts.

In a metaphor, you compare two or more things without the use of any particular word.

Example of simile: He looked at me like his father used to do.

Example of metaphor: His hair was leaves dancing with the wind in spring.