The Hollywood actor suited up to play the crime-fighting superhero in the 1997 blockbuster, which was universally panned by critics despite its box office success.
Now it's topped Empire magazine's Most Disastrous Movie poll, with fans complaining about the "overblown" script and cheesy acting.
The U.K. publication's editors rant, "It has become a byword for franchise-killing and bad movie-making."
Clooney's Batman & Robin racked up more than three times as many votes as the second place flop Battlefield Earth, which starred John Travolta as an alien leader.
Funnyman Mike Myers' slapstick comedy The Love Guru came in third, while 1980's Raise The Titanic and Epic Movie from 2007 rounded out the top five respectively.