1. the state or character of being monstrously stupid, dull, or foolish.
2. a monster or something monstrously stupid, dull or foolish.
From the word "monstrosity":
Middle English monstruosite, from Old French, from Late Latin mōnstrōsitās, from Latin mōnstruōsus, monstrous; see monstrous.
George W. Bush's presidential win in 2000 was a surprise and his re-election in 2004 was a moronstrosity. (In this example, both definitions apply)