Lesser Orc is a vague term that referred to the smaller and subordinate breeds of Orc and the lower castes of orcish society. The smallest slave-orcs were also referred to as Snagas, a contemptuous term for the lesser Orcs of Mordor and Isengard Orcs, used especially among the larger and stronger Uruk-hai.
The term was however quite inaccurate: while larger fighting-Orcs considered themselves superior to small Snagas, they were still looked down upon by the Uruks, who again quarreled among themselves as to who was of yet superior blood.