Also found in: Dictionary, Wikipedia.
ASS, a story ascribed to Buridan about a don-key that could not decide between two absolutely identical piles of hay and was doomed to starvation by his indecision. Metaphorically, an indecisive person.
placed exactly between two equal haystacks, could not decide which to turn to in his hunger. [Fr. Philos.: Brewer Dictionary, 154]