A situation or person that is a mess in every possible way.
Looking at the omnishambles he presides over, I'm driven to the conclusion that if David Cameron were a Soviet-style sleeper, inserted into the Tory party in his youth on a secret mission from its enemies to destroy it from within, he could not have done a better job.
—Nigel Jones, "So, what price the 'loonies, fruitcakes and racists' of UKIP now, Dave?," Daily Mail, August 20, 2012
Meanwhile on Twitter, the hashtag #RomneyShambles was trending on both sides of the Atlantic.
For instance, @Pawelmorski's Tweet read: "Americans: This Mitt person is some sort of American Borat, right? #romneyshambles"
The hashtag is a play on "omnishambles," from the BBC TV series "The Thick of It," a satire of British government.
—Jim Acosta, "Romney trip begins in shambles," CNN Wire, July 27, 2012
Not only have you got a...bent husband and a...daughter that gets taken to school in a...sedan chair, you're also...mental. Jesus Christ, see you, you are a[n]...omnishambles, that's what you are.
—Malcolm Tucker (played by Peter Capaldi), Series 3 - Episode 1, The Thick of It, October 24, 2009
Apologies for the expurgated version of the earliest citation. To restore, replace each ellipsis with the present participle form of your favorite f-word.