1. Can be used to describe a type of person; make commentary on a someone's personality (aka the kind of person who would shit in someone's vagina). Used mostly for females, but applicable to men, especially gay ones.
2. Can be used to describe a state of being (the kind of state you'd be in if someone shit in your vagina). Again, a term used mostly by females, though applicable to use by some males, especially gay ones.
1. That shitty cunt over there would totally make a move on your boyfriend, fucking bitch.
2. Ugh, I've had a terrible day, so I'm feelin' a lil' shitty cunt.