What does it means when people say that food items has been slacked off?

When people say that food items have been "slacked off", they usually mean that the food has been watered down or adulterated in some way. This can be done to reduce the cost of the food, or to make it more appealing to consumers. For example, some milk producers might water down their milk to increase their profits. Similarly, some restaurants might use low-quality ingredients or fillers in their food to cut costs. Slacking off food can have a negative impact on the quality and safety of the food, and it is important to be aware of the potential risks associated with consuming such foods.