The meat of a young sheep is called lamb. Specifically, lamb refers to the meat from a sheep that is less than 12 months old, which is tender and mild in flavor. On the other hand, the meat from a sheep older than one year is called mutton, which has a more intense flavor and somewhat less tender texture
. Therefore, the term "lamb" is used to refer to the meat of a young sheep, typically under 12 months of age
