A term from Texas Hold 'Em poker for the fifth and final community card to be displayed. It's also known as the river.
The term "fifth street" has been immortalized by the author James McManus, first in "Fortune's Smile", an article written for Harper's Magazine, and then fleshed out in his book Positively Fifth Street: Murderers, Cheetahs, and Binion's World Series of Poker. Both recount the trial for the murder of Ted Binion in conjunction with McManus's own unlikely success at the 2000 World Series of Poker.