white man's guilt 

The feeling that a white person may have when they think about slavery or simply the past mistreatment of any minority. It is the guilt felt for their "ancestor's" enslavement of African Americans or associated past mistreatment. Often it makes white people try and make up for things that have happened in the past.

I am voting Barack Obama simply because I have white man's guilt.

white man's guilt by WillyWonka12340 January 16, 2009