The phrase "hind milk" refers to the milk that is produced at the end of a breastfeeding session. It is creamier and richer in fat compared to the milk at the beginning of the session. Full definition
This helps to get enough of hind milk and feels secure. (theparentszone.com)
Your body needs fats to make the fatty hind milk that baby gets toward the end of a feeding. (breastmilk.com)
The milk at the end of a feeding is called hind milk and has more fat and calories than the fore milk at the beginning of a feeding. (verywellfamily.com)