Wiktionary
knave of spades
n. Alternative form of jack of spades
Usage examples of "knave of spades".
The knave of spades, now revealed, was the most sinister jack in the deck.
Now she's illuminating that, stuffy Congressman from Massachusetts--vulgar ungrammatcal shovel-maker--greasy knave of spades.
She was very fetching herself as the Queen of Hearts, and dragged her brother Brinsley over, who was dressed as the Knave of Spades.