Adjective indicating the state of being in shambles. The OED’s first cite is from 1970 (The Times) but curiously notes in small print: “Reported to be ‘in common use’ in 1958.”
To which I say, Hah! A Google Books search reveals a few dozen pre-1958 uses, the earliest being this from a 1939 issue of The Journal of Land & Public Utility Economics (and the telltale quotation marks indicate it’s a very early use indeed):
If judges are hesitant to adopt the findings made by a commission, and instead substitute their own inclinations, the administrative agency becomes not symbolic of legal progress but “shambolic.”
That is an American journal (don’t know the nationality of the author), but shambolic is nonetheless definitely a Britishism. Google Ngram data suggests it is currently used about five times more frequently in British than American English. But it is also a Not One-Off-Britishism: that same Ngram chart indicates frequency of use in American English has increased some 400 percent since the early ’90s.
Despite its shambolic start, the euro is not going to vanish. (Paul Krugman, New York Times, September 20, 2000.)/Taken together these albums hopefully represent the first unified volley in a new Philly sound — shambolic, shamanistic and completely cool. (Associated Press, August 15, 2011)