If you Take Pot Luck you take whatever is randomly given. The expression was widely used in medieval times, when food in a cooking pot, such as a stew, was always on the fire. Any visitor to a house being offered a meal would be ladled out whatever was in the pot and they called that “pot luck”. It of this also came the phrase Pot Shot, which meant that the hunter would try to kill any animal he saw, rather than track a particular type of game, to go in the family pot.