The phrase "most dastardly" is correct and usable in written English.
You can use this phrase to describe someone or something that is particularly villainous or wicked. For example: "The most dastardly of all villains was Lord Voldemort."
"It was in the most dastardly shape you've ever seen," he said, recalling an inspection he made last year.
It is Antonio who is accountable for what many feel is the play's most dastardly, unforgivable act.
At a stroke David Cameron reversed what is often seen as Margaret Thatcher's most dastardly act – the ending of free school milk in 1971 for over-sevens.
The impetus for the debate, of course, is the Collapse of Enron, the most dastardly event in the history of business.
Edward Bulwer-Lytton, a millionaire MP, had his wife, Rosina, certified when she harangued him at the hustings, and thereafter she offered him some literary help to create "the most dastardly villain in literary history – my husband".
A fund-raising letter for a prominent conservative radio show railed against the doctrine, calling it "the most dastardly collateral attack on freedom of speech in the history of the country".
Karl Marx called him "the dastardly, most miserable and meanest of blackguards".
But it is a leap to assume he would have embraced Marxism; Marx himself once called Bolívar "that dastardly, most miserable and meanest of blackguards".
But the most galling aspect of his dastardly deception was that he got away with it – and changed the course of the series as a result.
According to the Daily Mirror reporter Elizabeth Hassell, the character became a "national TV heroine" to viewers shortly after arriving, for standing up to the antics of her dastardly husband, and is most often cited as a "strong" and "clever" woman; "hard as nails" in "the grand tradition of landladies of the Queen Vic".
All that has led to a kind of conspiracy overload in which many people shrug their shoulders at the most strident assertions of impending doom or dastardly evildoing.
