Important Idioms and Phrases starting with Alphabet- C
| S.No. | Idioms/Phrases | Meaning |
| 1. | Carry the coal to newcastle | Spending time and energy in doing something that is useless and wastage of energy |
| 2. | Cast pearls before swine | A right thing in a wrong hand |
| 3. | Castles in the air | Day dream/ a hope or desire unlikely to be realized |
| 4. | Cat and dog life | Troublesome life |
| 5. | Catch a tartar | To grapple with a unexpectedly formidable opponent |
| 6. | Cat’s paw | A person used by another as a dupe or tool |
| 7. | Chew the cud | To ponder over / meditate |
| 8. | Chicken hearted | Lacking courage / cowardly |
| 9. | Cock-and-bull story | A concocted story |
| 10. | Crocodile tears | An false display of grief |
| 11. | Cross swords | To quarrel or fight |
| 12. | Cry for the moon | To desire the unattainable |
| 13. | Cry over spilled milk | Regret in vain for what cannot be undone |
| 14. | Cut a sorry figure | To give a poor show |
| 15. | Cut both ways | Argue in favour of both sides |
| 16. | Cut no ice | To fail to make an impression |
| 17. | Cut one’s coat according to one’s cloth | To live within one’s means |