Can’t dance and it’s too wet to plow
Can’t see the forest for its trees
Cat’s lick
Caught with your hand in the cookie jar
Champagne taste on a beer budget
Chase rainbows
Close only counts in horseshoes and hand grenades
Close the stable door after the horse has bolted
Crack a nut with a sledgehammer
Cross my heart and hope to die
Cross that bridge when you come to it
Cut off your nose to spite your face
Cut your coat according to your cloth
