Land-damn.
A corruption of landan (to rate or reprove severely). According to Dean Milles the word is still used in Gloucestershire.
“You are abused … would I knew the villain, I would land-damn him.”—Shakespeare: Winter’s Tale. ii. 1.
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Entry taken from Dictionary of Phrase and Fable, edited by the Rev. E. Cobham Brewer, LL.D. and revised in 1895.