Fort Whoop-Up (officially known as Fort Hamilton) was the nickname given to an area near Lethbridge, Alberta which, during the late 1800s, served as a centre for various illegal activities. During this time, the sale of whiskey was outlawed; however, due to the lack of a police force in the region at the time, many whiskey traders had settled in the area and taken to charging unusually high prices for their goods.
Fort Whoop-Up was first built in 1869 by J.J. Healy and A.B. Hamilton with the purpose of being a whiskey post. Its first structure was destroyed by fire within a year of its construction — whether this was an accident or deliberate arson is unknown. A second, more sturdy structure later replaced Fort Whoop-Up.
One type of alcohol sold by the Whoop-Up bandits was known as Whoop-Up Bug Juice. Whoop-Up Bug Juice was a highly-priced alcohol spiked with ginger, molasses, and red pepper. It was then coloured with black chewing tobacco, watered down, and boiled to make "firewater". One Native man reportedly traded two horses for a single jug of the Bug Juice.
Most notably, the outlaws of Fort Whoop-Up and surrounding areas directly contributed to the formation of the North-West Mounted Police.
Once formed, the North-West Mounted Police helped drive-out the Whoop-Up whiskey traders. Their first strike on the traders came after a Native complained at Fort Macleod about a group of whiskey traders who had sold him overpriced Whoop-Up Bug Juice. Shortly after, the North-West Mounted Police caught and fined the perpetraters. It was only a matter of time before the rest of the whiskey traders were chased out of "Whoop-Up Country".
http://www.homepages.dsu.edu/jankej/oldwest/whoop_up.htm