According to legend, Wild Bill Hickok was murdered whilst holding 2 pairs, aces and eights, in a game of 5 card stud poker.  The remaining card remains a mystery, however given he took an extra bullet to the head, I guess he cashed out with a full house.

"Fifth street" is the term used when the fifth card gets dealt.
A hand with two aces and eights has since been known as the dead man's hand.