chalk and cheese

a little bit of bread and no cheese

Used to represent the song of the yellowhammer (Emberiza citrinella).

big cheese

A very important figure, especially a high-ranking person in an organization.

chalk off

To record a score or event, as if on a chalkboard.

chalk something up to experience

To take a lesson from a bad outcome instead of grieving it.

chalk up to

To attribute or account for something; to ascribe.

cheese tax

A portion of cheese given to a domestic animal such as a dog or cat, usually when the cheese is being brought out or prepared for human consumption.

cock cheese

Smegma or dried semen on the glans penis, usually underneath the foreskin.

cut the cheese

To fart loudly.