iron cunt 

A nickname sometimes used in Britain to refer to Margaret Thatcher.

I'm so glad the Iron Cunt is no longer in office.

iron cunt by fry_laurie January 30, 2016

Cast Iron Cunt 

A Cast Iron Cunt is the opposite of a "normal' cunt. Whereas a cunt is a very useful thing to both men and women, the Cast Iron Cunt is totally fucking useless piece of crap.

That idiot manager at the shop is a Cast Iron Cunt...totally useless.

Cast Iron Cunt by FuckFac3 April 9, 2012