(poker) A pair of aces and a pair of eights (especially, the black aces and eights), in a player's hand.
1907,Davida French; Esther Stevens, Laura Wells,“The Rulers of the Realm”, inNot Included in a Sheepskin: Stanford Stories, Stanford: The Stanford Book Store, page 172:
"A dead man's hand or queens on the roof at least," suggested Southack. "They say two aces and two eights can never be beat."
(poker,obsolete) Other various hands, among them a full house of three jacks and two tens.
1903,Cora Linn Morrison Daniels, Charles McClellan Stevens, editor,Encyclopædia of Superstitions, Folklore, and the Occult Sciences of the World, volume 3, J. H. Yewdale, page 1478:
When playing poker, should you hold a jack full on red sevens, it means death, and is called "a dead man's hand".