King Charles's head
noun
-ˈchärlz(ə̇z)-
: obsession sense 3
that King Charles's head of modern America, the menace of Communism 
Times Literary Supplement
Times Literary Supplement
Word History
Etymology
after Charles I †1649 king of England, who was beheaded; from the habit of Mr. Dick, character in David Copperfield, novel by Charles Dickens †1870 English novelist, of introducing the subject of King Charles's head into all discussions