cold fish

a cold day in July

The time of occurrence of an event that will never happen.

big fish

An important person.

big fish in a small pond

One who has achieved a high rank or is highly esteemed, but only in a small, relatively unimportant, or little known location or organization.

bigger fish to fry

A much more pressing issue to attend to.

blow hot and cold

To behave inconsistently; to vacillate or to waver, as between extremes of opinion or emotion.

catch a cold

To contract a cold.

cold cash

Money, regarded as an incentive that can override any doubts or ethical concerns.

cold chills

Feelings of fear.