| chase after |
| chase a rainbow |
| chase away |
| chase off |
| chase one's tail |
| chase rainbows |
| chase tail |
| chase the dragon |
| chat up |
| cheap-arse Tuesday |
| cheap drunk |
| cheaper by the dozen |
| cheap thrill |
| cheat on |
| cheat sheet |
| check and balance |
| check is in the mail |
| check the math |
| check through |
| checkup from the neck up |
| cheek by jowl |
| cheeky monkey |
| cheer up |
| cheesed off |
| cheese tax |
| cherry on top |
| cherry-pick |
| chess piece |
| chesterfield rugby |
| chew off |
| chew on |
| chew the cud |
| chew the meat and spit out the bones |
| chew the scenery |
| chew up |
| chicken feed |
| chicken out |
| chicken scratch |
| child's play |
| chill to the bone |
| chilly climate |
| chime in |
| Chinaman on one's back |
| Chinaman's chance |
| China's final warning |
| China syndrome |
| Chinese compliment |
| Chinese green |
| Chinese overtime |
| Chinese puzzle |
| Chinese Wall |
| Chinese water torture |
| chink in the armor |
| chink up |
| chip away |
| chip in |
| chip off the old block |
| chip on one's shoulder |
| chip shot |
| chip up |
| chirk up |
| chocolate teapot |
| choke off |
| choke the chicken |
| chomp at the bit |
| choose one's fighter |
| choose up |
| choose violence |
| chop down |
| chopped liver |
| Christmas come early |
| Christmas graduate |
| Christmas tree bill |
| chrome dome |
| chrome horn |
| chum in the water |
| chump change |
| chump-change |
| chum up |
| circle back |
| circle the drain |
| circle the wagons |
| circuit slugger |
| circular file |
| circular firing squad |
| civil tongue |
| claim someone's life |
| claim to fame |
| clamp down on |
| clap eyes on |
| clap one's hands red |
| clash of the ash |
| class clown |
| clean as a hound's tooth |
| clean as a whistle |
| clean break |
| cleaner |
| clean hands |
| clean money |
| clean someone's clock |