A piece of vulgar profanity, common in mining camps: possibly invented in Scotland.
1834. Dog ont, youll bring bluid.J. Wilson, Noctes Ambrosianæ, Blackw. Mag., xxxvi. 132 (July).
1892. See a letter by Mr. J. B. Harrison of New Hampshire, in The Nation, N.Y., liv. 303.
1851. Mayne Reid, The Scalp Hunters. (N.E.D.)