idiocy

noun

1. (countable, dated, derogatory, uncountable)The state or condition of being an idiot; the quality of having an intelligence level far below average.
2. (uncountable)Lack of intelligence or sense; extremely foolish behaviour.

   “The administrators, growing tired of such idiocy, put a new policy in place.”

3. (countable)An idiotic act or utterance.

   “The list of his idiocies is seemingly interminable.”