Wiktionary
n. One of the 52 playing cards from a standard pack as used for bridge and poker, with a picture of a jack (or knave), with a nominal value of 11, and with the spades suit.
Wikipedia
Jack of Spades (French: Chien de pique) is a 1960 French drama film directed by Yves Allégret and starring Eddie Constantine, Raymond Pellegrin and Marie Versini.
Usage examples of "jack of spades".
That night her sleep was deeper than it had been in a long time, deep as she had expected sleep would never be again, and she was not plagued by any dreams at all, not a dream of children suffering, nor of tumbling in a car along a rain-washed street, nor of thousands of windblown dead leaves rattling-hissing along a deserted street and every leaf in fact a jack of spades.
He snapped up the jack of spades and the eight of diamonds, then leaned back and took a long drag on his cigar.
She saw the queen of diamonds with her throat wounded by the steel of the jack of spades, and she deduced that Fernanda was trying to get her husband back home by means of the discredited method of sticking pins into his picture but that she had brought on an internal tumor because of her clumsy knowledge of the black arts.
Jan threw in the ten, Kobyella took the trick and played the king, I should have taken but didn't, instead I discarded the eight of clubs, Jan threw in what he could, he even led once with the ten of spades, I bettered it and I'm damned if Kobyella didn't top the pile with the jack of spades, I'd forgotten that fellow or rather thought Jan had it, but no, Kobyella had it.
The one I palmed was the seven of diamonds-the facing card in the pack was now the jack of spades.