| cop oneself on |
| cop one's whack |
| cop out |
| copper-bottomed |
| corner the market |
| corporate ladder |
| corporate welfare bum |
| corporation pop |
| cost the earth |
| cotton-picking |
| cotton to |
| couch potato |
| cough up |
| could not get elected dogcatcher |
| couldn't be more different |
| couldn't care less |
| couldn't carry a note in a bucket |
| couldn't happen to a nicer |
| couldn't organise a piss-up in a brewery |
| couldn't stop a pig in a passage |
| count angels on pinheads |
| count noses |
| count one's blessings |
| count one's days |
| country mile |
| count sheep |
| count to five |
| count to ten |
| count to three |
| courage of one's convictions |
| court of public opinion |
| covenant of salt |
| cover one's bases |
| cover one's feet |
| cover someone's ass |
| cover up |
| cowboy killer |
| cowboy shower |
| cowboy up |
| cowgirl position |
| cow juice |
| crab mentality |
| crack a crust |
| crack a fat |
| crack a smile |
| crack down |
| crack of dawn |
| crack through |
| crack up |
| cradle robber |
| cradle snatcher |
| cradle-to-grave |
| cramp someone's style |
| crank one's hog |
| crank out |
| crank the handle |
| crank up |
| crapshoot |
| crap up |
| crash course |
| crash dive |
| crawl before one walks |
| crawl into a hole |
| crawl over each other |
| crawl with |
| crazy enough to work |
| cream in one's coffee |
| cream in one's jeans |
| cream of the crop |
| cream the crop |
| creature comfort |
| creature feature |
| creature of habit |
| creature of statute |
| creature of the night |
| creepy-peepy |
| crème de la crème |
| crescent spanner |
| criss-cross applesauce |
| crocodile tear |
| crony capitalism |
| crop up |
| cross my heart |
| cross my heart and hope to die |
| cross off |
| cross of gold |
| cross out |
| cross paths |
| cross-purpose |
| cross someone's palm |
| cross someone's path |
| cross swords |
| cross that bridge when one comes to it |
| cross the aisle |
| cross the line |
| cross the Rubicon |
| cross the Thames |
| cross the Tiber |
| cross to bear |
| cross to take up |