Green’s Dictionary of Slang

a mess, a mistake, an error.

1841		W. Gresley Charles Lever 21: What a boggle he did make of it, to be sure!
1862		Sat. Rev. (London) XIII 121: Jones of the 43rd, who got into that boggle in Armenia .
1888		S.O. Addy Sheffield Gloss. 21: Boggle, a bungle.
1894		Luton Times 20 Apr. 6/1: A policy which been described by an able political writer [...] as a policy of boggle.
1900		Chelsmford Chron. 9 Nov. 3/6: [headline] A Boggle at Barking.
1903		Essex Newsman 28 Feb. 3/6: Walthawstow Boggle. Walthamstow is essentially a working-class constituency and more suited for a Labour candidate than a Liberal.
1913		Cut bank Pioneer Press (MT) 16 May 8/1: Government irrigation was a never-ending unraveling of red tape [...] a bungle and a boggle in most instances.
1940		(con. 1753) B.R. Wellington Mystery of Elizabeth Canning 199: [S]he had made such a boggle of that beautifully designed and laboriously perfected alibi.