Jack of diamonds, Jack of diamonds
I’ve known you from old,
You’ve robbed my poor pockets
Of silver and gold
Traditional American

The mental disintegration of a card-player following a reverse is played excellently by Steve McQueen in the film The Cincinnati Kid, where he’s a promising champion poker player out to win glory against the best around only to lose all against Edward G. Robinson in the final hand. The hole card that did the damage to the Kid was the Jack of Diamonds.

In 1949, Johnny Moss played Nick “The Greek” Dandalos in a legendary session of non-stop no-limit poker at Binion’s Horseshoe Casino, Las Vegas. They played for five months, breaking only for sleep.

One of the most famous hands of poker took place when they were playing five-card stud. The Greek bet very heavily, but Moss thought his pair of nines was a winning hand. Then the last card was turned, a jack.

The Greek turned his hole card over – it was the Jack of Diamonds. He won. But Johnny Moss wasn't phased since he knew if his opponent took risks like that he would eventually succeed in cleaning the Greek out. Which he did.