–noun, plural 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.
Origin: 1965–70, Americanism; from trademark name of a chocolate cookie with a white cream filling
n. an American of African descent who behaves more white than black. (Like the Oreo brand cookie, the person is black on the outside and white on the inside. Rude and derogatory.) : They called Sam an oreo because he wears a suit and works downtown.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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Word Origin & History
Oreo
derogatory word for "black person felt to have a 'white' mentality," 1968, black Amer.Eng., from the snack cookies, which consist of dark chocolate wafers and white sugar cream filling (hence "brown outside, white inside"). The cookies (made by Nabisco) date from 1912; the source of the name has been forgotten.
[awr-ee-oh, ohr-] 
