Senator Barack Hussein Obama's presidential campaign. Also, what will happen to America if he makes office. Rhymes with and closely related to "abomination."

n.: the segment of Barak Obama supporters who think he is the messiah. Like a homeless person, the typical member walks around in a daze endlessly repeating the refrain: “Change.” The Obama-nation is an abomination.

Not to be confused with abomination.
Obama-nation is the beginning of a new era in American History.