O•re•o(ôr′ē ō′, ōr′-),USA pronunciationn., pl.O•re•os.Slang (disparaging and offensive).
a black person who is regarded as having adopted the attitudes, values, and behavior thought to be characteristic of middle-class white society, often at the expense of his or her own heritage. Also, o′re•o.
from trademark name of a chocolate cookie with a white cream filling 1965–70, American.