| Idiom | Meaning | Example | 
| cool your heels | 
wait for a judgement, serve a detention
 | 
Chad is cooling his heels in the Remand Centre - the city jail.
 | 
| cooler heads prevailed | 
sensible people spoke, violence was avoided
 | 
There was nearly a riot, but cooler heads prevailed.
 | 
| coon's age | 
(See in a coon's age)
 | 
 | 
| cop | 
policeman, fuzz, pig
 | 
I know this cop on the Calgary Police Force - he's a nice guy.
 | 
| cop out | 
an excuse, not trying, not doing your share
 | 
Instead of speaking, he showed a video. What a cop out!
 | 
| copacetic | 
agreeable, fine, go along with, okay, OK
 | 
Don is copacetic. He agrees with our plans.
 | 
| copper | 
(See cop)
 | 
 | 
| corked | 
intoxicated, drunk, plastered, sloshed
 | 
Grant got corked last night and walked home. He couldn't drive.
 | 
| corner the market | 
become the main supplier, have a monopoly
 | 
Japanese automakers are trying to corner the luxury car market.
 | 
| corner you | 
insist that you listen, buttonhole you
 | 
If Helmer corners you, tell him you have to go to the bathroom.
 |