La Cucaracha by Lalo Alcaraz for August 17, 2011

I’ll see your Herman Cain and raise you an Alan Keyes. Btw, I’ve met Alan Keyes and enjoyed working on his senate campaign.

I’ve met Prof. Walter Williams and enjoy reading his weekly columns.

Is this the meaning that you were looking for:

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www.urbandictionary.com/define.php?term=Uncle%20Tom.A black man who will do anything to stay in good standing with “the white man” including betray his own people.

How about “a term used by some in the black community to describe any black man that tries to make something of himself”