| Cadillac problem |
| cake and gingerbread |
| cake crumbs |
| cakes and ale |
| cake walk |
| cakewalk |
| call a lid |
| call an audible |
| call a spade a spade |
| call it |
| call it a day |
| call it an early night |
| call it a night |
| call it stumps |
| call off the dogs |
| call on |
| call out |
| callout |
| call roll |
| call someone every name in the book |
| call someone everything but a child of God |
| call someone's bluff |
| call someone's number |
| call to account |
| call to the bar |
| call up |
| calm before the storm |
| camel's nose |
| camel through the eye of a needle |
| camp as a row of tents |
| camp out |
| camp out on |
| canary fit |
| canary in a coal mine |
| cancel someone's Christmas |
| candle |
| candle in the wind |
| can it |
| cannot make it |
| can of corn |
| can of worms |
| can't carry a tune in a bucket |
| can't get enough |
| can't help |
| can't stand |
| can't stand the sight of |
| can't wait |
| cap in hand |
| cap it all off |
| cap over the windmill |
| captain's pick |
| carbonated water |
| carbon burning |
| card of ten |
| care a button |
| care a jackstraw |
| care a whit |
| care package |
| carriage trade |
| carried away |
| carrot and stick |
| carry a torch |
| carry away |
| carry coals to Newcastle |
| carry forward |
| carry off |
| carry on |
| carry oneself |
| carry one's weight |
| carry out |
| carry over |
| carry someone's water |
| carry the ball |
| carry the can |
| carry the mail |
| carry the message to Garcia |
| carry through |
| carry water for |
| carved in stone |
| case the joint |
| cashed up |
| cash in one's chips |
| cash on the barrelhead |
| cash up |
| cast a chill |
| cast a shadow |
| cast aside |
| cast aspersions |
| cast in concrete |
| cast in someone's teeth |
| castle in the air |
| cast loose |
| cast of thousands |
| cast one's bread upon the waters |
| cast one's mind back |
| cast one's net wide |
| cast one's vote |
| cast over |
| cast pearls before swine |
| cast snowballs |