E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
used as an expletive in such phrases as A bloody fool, Bloody drunk, etc., arose from associating folly and drunkenness, etc., with what
are called Bloods, or aristocratic rowdies. Similar to Drunk as a lord.
It was bloody hot walking to-day.Swift: Journal to Stella, letter xxii.