Though such specimens are actually members of the genus Homo and the species Sapien this rather ordinary human being is often referred to figuratively and derogatively, as a sheep, not to be confused with other even-toed ungulates. Note: political activists refer to them as citizens. ;-)
sheep noun, often attributive:
1: any of various hollow-horned typically gregarious ruminant mammals (genus Ovis) related to the goats but stockier and lacking a beard in the male; specifically: one (O. aries) long domesticated especially for its flesh and wool
2a: a timid defenseless creature
2b: a timid docile person; especially: one easily influenced or led (Merriam-Webster online)