Green’s Dictionary of Slang

an excl. expressive of surprise or denial, used as a euph. for damned adj. in general mild oaths of surprise, shock, annoyance; usu. as blow me tight if….

1809		Sporting Mag. Nov. 94/1: Blow me tight into a gin-shop, if he wasn’t off before the old woman cou’d sing ‘Fillaloo...’ [etc.].
1811		J. Poole Hamlet Travestie I iv: And if I e’er forget thee—blow me tight.
1819		‘One of the Fancy’ Tom Crib’s Memorial to Congress 46: Says BILL, ‘there’s nothing like a Bull: / ‘And blow me tight’.
1821		Egan Life in London (1869) 261: Blow me tight, if ever I saw such a thing in my life before.
1830		Lytton Paul Clifford I 74: If ever I know as how you makes a flat of my Paul, blow me tight, but I’ll weave you a hempen collar: I’ll hang you, you dog, I will.
1841		‘The Musical Coalheaver’ Dublin Comic Songster 98: I’ll bet – if I don’t, blow me tight, / A crown unto a farden.
1848		G.W.M. Reynolds Mysteries of London II (2nd series) 34: ‘Then blow me tight,’ says he.
1854		R.S. Surtees Handley Cross (1924) 55: Blow me tight! if it weren’t for the bright colours there wouldn’t be many fox-’unters.
1859		Hotten Dict. of Modern Sl. etc. 8: blow me tight, a vow; [...] ‘blow me up’ was the term a century ago.
1865		G. Swaine ‘Susan’s Sunday Out’ 🎵 Oh! Gimini crikey blow me tight! I always jump and shout.
1877		‘Larry Cafooslem’ Laughing Songster 160: Blow me tight, / I began to talk away.
1879		London Life 7 June 6/2: [They] and ‘blow each other tight’ with amazement at the serene nonchalance with which the inspirer of their delight treats their broadest insinuations.
1886		Stephens & Yardley Little Jack Sheppard 50: 🎵 A little bit of Whitechapel – ‘What cheer, cull? Blow me tight!’.
1890		‘’Arry on Equality’ Punch 22 Feb. 85/2: Blow me tight / If I don’t rayther cotton to huxley.
1897		Glasgow Herald 6 Dec. 9/4: He much too often reiterated the soldier’s oath ‘Blow me pink’.
1901		B. Pain De Omnibus 53: ‘Why, blow me tight,’ yer says ter the gal be’ind the bar, civilly, ‘if I ain’t come art withart it!’.
1904		Sydney Sportsman (Surry Hills, NSW) 21 Sept. 4/7: ‘Blow me tight,’ said one of the scramblers, ‘he's rolling the ground with his trilbies’.
1905		Marvel III:53 2: Why, blow me pink, if that ain’t old Sol Zuker.
1910		Hull Dly Mail 29 Mar. 3/2: It’s my ring. I had me name cut in it, blow me pink if I didn’t.
1914		Sport (Adelaide) 4 Sept. 5/2: Blow me tight he forgot his text when preaching.
1933		P. MacDonald Myst. Dead Police 6: ‘Blow me tight!’ said Sergeant Guilfoil. For things were certainly happening in Farnley [OED].
1960		Wodehouse Jeeves in the Offing 79: Blow me tight if I didn’t behold Kipper alighting from his car at the front door.
1971		Wodehouse Much Obliged, Jeeves 26: Blow me tight if the b.p. wasn’t Jeeves.