shit-cunt
Derogatory term for a person, most notably used when referring to females. The joining of the two curse words is designed to further emphasise that the subject being referred to is more than just a mere cunt. It's vulgarity in terms of literal meaning is also to further emphasise that the subject being referred to is a particularly unsavoury or disagreeable character in terms of actions and/or opinion. The adding of a 3rd curse or whole insult to pre-empt the original insult is to add body and weight to the vocal impact. 

Usually used by inebriated Eagans*

*see def for "eagan"
"that fuckin bird is a fuckin shit-cunt. I could be in Norfolk fucking a nurse but i'm stuck here with that cock teasing shit-cunt...you you're like the big brother i've already got two of but her...shit-cunt!"