C-list is short for Cum List. It is a mental list a woman has that consists of all her sexual partners that have made her orgasm or CUM. As with such phrases as 'notches in the Bedpost' it is a personal mental tally. Yet with the C-list it is more a case of quality over quantity, and is a prestige for the average man to achieve.
After what Bradley did to me on friday night, that boy has been added to my C-list