A word used to describe somebody who is a bitch to the core. By far the worst word you could EVER call a girl. They are a terrible person inside and out and deserve to be alone for the rest of their lives. They do evil things on purpose and only care about themselves. Cunt can also be associated with the word "whore" much of the time, but do not confuse the two.
EW! That girl Meg is a total cunt. Why would anybody like her!?