Thunder Cunt

For when calling someone a cunt just simply won't do.
When somebody has committed something dickish of such a gargantuan nature, they are a thunder cunt.

Think of someone acting like a cunt and times by approx. 1000. That should give you a rough idea!

Martin has been put in charge again. He's had a pint of power and now he's power pissed and acting like a thunder cunt!

My ex slept with one of my mates to try get back at me. What a thunder cunt!