acutally sorca has two meanings.
First of all, it is not a very polite word to use, so watch out to whom you're talking to.
It is a word for female genitals ( literally means 'mouse'), but can be also used to refer to a very beautiful, "hot" woman.
In some regions of Italy ( for instance Lazio )it can be turned into an expression usable for men : sorco ( a very hot guy).
Sei proprio una sorca!
You are really hot.
Guarda quello, non è un sorco ?!
Hey look at him, isn't he hot ?!