Der OED setzt den Beginn dieses Gebrauchs sogar noch früher an:
"In foul language, a vague epithet expressing anger, resentment, detestation; but often a mere intensive, esp. with a negative, as ‘not a bloody one’. [Probably from the adv. use in its later phase.]
1785 Fifth Session Old Bailey May 722/1 The prisoner Fennell swore an oath, if he had a knife he would cut his bloody fingers off.
1840 R. H. Dana Two Years before Mast ii. 2 You'll find me a bloody rascal.
1840 R. H. Dana Two Years before Mast xx. 61 They've got a man for a mate of that ship, and not a bloody sheep about decks!
1880 J. Ruskin Fiction Fair & F. §29 The use of the word ‘bloody’ in modern low English is a deeper corruption, not altering the form of the word, but defiling the thought in it.
1950 Landfall 4 23 You mind your own bloody business.
1950 G. Wilson Brave Company v. 83 Thrilling? Hell's bloody bells!"
Als intensivierender Partikel ist es sogar noch länger im Gebrauch:
"As an intensive: Very‥‥and no mistake, exceedingly; abominably, desperately. In general colloquial use from the Restoration to c1750; ‘now constantly in the mouths of the lowest classes, but by respectable people considered ‘a horrid word’, on a par with obscene or profane language, and usually printed in the newspapers (in police reports, etc.) “b——y”’. N.E.D. Also in tmesis.[The origin is not quite certain; but there is good reason to think that it was at first a reference to the habits of the ‘bloods’ or aristocratic rowdies of the end of the 17th and beginning of the 18th c. The phrase ‘bloody drunk’ was apparently = ‘as drunk as a blood’ (cf. ‘as drunk as a lord’); thence it was extended to kindred expressions, and at length to others; probably, in later times, its associations with bloodshed and murder (cf. a bloody battle, a bloody butcher) have recommended it to the rough classes as a word that appeals to their imagination. We may compare the prevalent craving for impressive or graphic intensives, seen in the use of jolly, awfully, terribly, devilish, deuced, damned, ripping, rattling, thumping, stunning, thundering, etc. There is no ground for the notion that ‘bloody’, offensive as from associations it now is to ears polite, contains any profane allusion or has connection with the oath ‘'s blood!’]
1676 G. Etherege Man of Mode i. i. 10 Not without he will promise to be bloody drunk.
1684 Dryden Prol. to Play call'd Disappointment, The Doughty Bullies enter Bloody Drunk.
1693 T. Southerne Maids Last Prayer ii. ii. 31 Faith and troth, you were bloody angry."
... und so weiter.