| cast the first stone | | | |
| cast up one's accounts | | | |
| cat and dog life | | | |
| cat-and-mouse | | | |
| catbird seat | | | |
| Catch-22 | | | |
| catch a body | | | |
| catch a break | | | |
| catch a case | | | |
| catch a cold | | | |
| catch a date | | | |
| catch a fade | | | |
| catch a falling knife | | | |
| catch air | | | |
| catch a packet | | | |
| catch as catch can | | | |
| catch-as-catch-can | | | |
| catch a stray | | | |
| catch a wave | | | |
| catch big air | | | |
| catch dust | | | |
| catch feelings | | | |
| catch fire | | | |
| catch flies | | | |
| catch hands | | | |
| catch heat | | | |
| catch hell | | | |
| catch it | | | |
| catch napping | | | |
| catch of the day | | | |
| catch on | | | |
| catch one's breath | | | |
| catch one's death | | | |
| catch red-handed | | | |
| catch sight of | | | |
| catch someone napping | | | |
| catch someone's drift | | | |
| catch someone's eye | | | |
| catch some rays | | | |
| catch some z's | | | |
| catch the eye | | | |
| catch the sun | | | |
| cat-foot | | | |
| cat-footed | | | |
| cat got someone's tongue | | | |
| cat in the meal-tub | | | |
| cat in the sack | | | |
| cat-lick | | | |
| cat piss | | | |
| cat's cradle | | | |
| cat's meow | | | |
| cat that ate the canary | | | |
| cattle call | | | |
| caucus race | | | |
| caught short | | | |
| caught up | | | |
| caught with one's pants down | | | |
| cause a stir | | | |
| cautionary tale | | | |
| cave-in | | | |
| caviar to the general | | | |
| cede the field | | | |
| Celtic curse | | | |
| center field | | | |
| chalk and cheese | | | |
| chalk off | | | |
| chalk something up to experience | | | |
| chalk up to | | | |
| champagne taste on a beer budget | | | |
| champ at the bit | | | |
| chance'd be a fine thing | | | |
| chances are | | | |
| chance upon | | | |
| change collars | | | |
| change hands | | | |
| change horses in midstream | | | |
| change of clothes | | | |
| change of heart | | | |
| change of life | | | |
| change of pace | | | |
| change of scenery | | | |
| change of tack | | | |
| change one's battery | | | |
| change one's mind | | | |
| change one's story | | | |
| change one's tune | | | |
| change over | | | |
| change someone's mind | | | |
| change the channel | | | |
| change the game | | | |
| chaotic neutral | | | |
| character assassination | | | |
| charge down | | | |
| charge up | | | |
| charity begins at home | | | |
| charity mugger | | | |
| charley horse | | | |
| charmed life | | | |
| charm offensive | | | |
| charm the birds from the trees | | | |