The Full Form of FEFO is First expired, first out.

FEFO is an acronym of the words First Expired, First Out. In practice, usually just the acronym FEFO is used. This is a simple, highly versatile management method, or way of organizing, handling and prioritization of moving of primarily material or other commodities. Material requirements are serviced in the order of items with the earlier date of consumption regardless of the date of entry or acquisition. The term FEFO is most often used in logistics and transportation, warehouse management, inventory flow management and production logistics.

This term is used in logistics and inventory management to describe a way of dealing with product with a limited shelf life such as perishable products, or consumer goods with a specified expiry date. The product with the deadline for the next intake will be the first to be served or removed from stock. Majorly used in Pharmaceutical and Chemical industry where expired dates are calculated based on Batch expired date or Shelf life time.