Green’s Dictionary of Slang

1. euph. variation on damn v. (1) me!

1827		J. Wight More Mornings in Bow St. 55: I shan’t stir till I’ve got my money, blow me if I do!
1834		‘Of All The Blowings On The Town’ in Flash Chaunter 5: But blow me if I care a d--n.
c.1845		R. Barham ‘My Letters’ in Ingoldsby Legends (1847) 355: I’ll burn them precious stacks down, blow me!
1861		‘The Rat-Catcher’s Daughter’ in Bryant’s Songs from Dixie’s Land 15: In love I’ll constant prove, and – blow me if I’ll live long arter.
1892		‘The Little Crossing-Sweeper’ in ‘F. Anstey’ Mr Punch’s Model Music Hall 82: No, blow me if I can do it, for I feel my eyes are all twitching.

2. (US) a dismissive excl. [late 20C+ blow v.² (1c)].

1997		G. Sikes 8 Ball Chicks (1998) 80: Handwritten replies decorated every available inch: fuck you, blow me.
1999		W. Gibson All Tomorrow’s Parties 226: The still, small voice of mortality. Blow me, Laney tells it.
2010		C. Hiaasen Star Island (2011) 8: ‘Thanks for nuthin! ‘Blow me’.
2013		T. Robinson Hard Bounce [ebook] ‘Hey!” I yelled at the cop. ‘Step off! Until you introduce yourself, you can blow me with the interrogation’.
2022		I. Fitzgerald Dirtbag, Massachusetts 90: ‘Blow me,’ said the person’ I’ll never forget.