c-note

　　[释] a $100 bill, the Roman numeral for 100 is C;

　　[例] Do you have change for a c-note?;

　　cocky

　　[释] being over self confidence and self assertive;

　　[例] He's become so cocky. He thinks he's so much better than everyone since he won that award.

　　cog in machine

　　[释] a minor person in a larger organization;

　　[例] If it were not for my technical knowledge, I'd be just a cog in the machine.;

　　coke diet

　　[释] very thin due to their cocaine usage;

　　[例] Some models are on coke diet to keep a good shape.

　　cold

　　[释] heartless/no emotions;

　　[释] He laughed at the crippled man who fell down, that's cold.;

　　cold feet

　　[释] to get nervous and change your mind;

　　[例]The groom felt so desperate that the Bride got cold feet, so she escaped her gigantic wedding.