| Idiom | Meaning | Example | 
| a close shave | 
very close to serious injury or death
 | 
The old man described his fight with the bear as a close shave.
 | 
| a clutch hitter (baseball) | 
a batter who hits when runners are on base
 | 
Joe's a clutch hitter. He's batting .431 with runners on base.
 | 
| a common thread | 
an idea or theme that is similar to others
 | 
There's a common thread in most of Berton's stories.
 | 
| a contract out on | 
a contract that pays to have someone killed
 | 
There's a contract out on Mike. The boss doesn't like him.
 | 
| a coon's age | 
many years, a dog's age
 | 
We haven't been out to the coast in a coon's age. It's been years.
 | 
| a crash course | 
a short course that has the main facts and skills
 | 
He took a crash course in cooking and bought a cafe.
 | 
| a crush on | 
sudden feeling of love or romance
 | 
Judy has a crush on Tim. See the way she looks at him.
 | 
| a crying shame | 
a sad event, it is too bad
 | 
It's a crying shame that they didn't have fire insurance.
 | 
| a cut above | 
superior, better
 | 
A scholar's work is a cut above. It's superior to the others.
 | 
| a cut-up | 
a joker, a person who tells jokes and has fun
 | 
When Marsha goes to a party she's a real cut-up - a lot of fun.
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