Giffen goods are essential non luxury goods which violate basic law of demand.
Demand for giffen goods rises when the price rises and falls when the price falls. Examples of giffen goods include bread, rice, wheat etc which are essential goods with few substitutes at the same price levels.
For instance, if the price of rice increases, then people with less income will be forced to give up consumption of luxury items say for example, meat but they will have to increase rice consumption to meet up with their calorie requirement since they are giving up on meat.
