Green’s Dictionary of Slang

rat v.1

[SE rot]

a euph. for damn v.; often in excl. below.

[UK]J. Miller Humours of Oxford V i: clar.: O fye upon you [...] how bravely the World would babble on such an Occasion. sham.: Ratt the World.
[UK]Fielding Letter Writers III i: Rat your Designs.
[UK]Sheridan Trip to Scarborough I ii: Rat the hooks and buttons, Sir, can anything be worse than this?
[Ire]M. Lonsdale Spanish Rivals I iii: Rat the man’s assurance! If I know what to make of him I’m a nun.
[UK]T.H. ‘Punch’s Apotheosis’ in Smith Rejected Addresses 126: Old Polony like a sausage, [...] exclaim’d ‘Rat! Rat!’.
[UK]Navy at Home II 206: Who you call nigger, rat you, answer me dat?
[UK]Thackeray Adventures of Philip (1899) 555: ‘Rat that piano!’ She ‘ratted’ the instrument, because the music would wake her little dears upstairs.

In exclamations

rat me! (also rat it!)

a general excl.

[UK]Congreve Way of the World III iii: Rat me, knight, I’m so sick of a last night’s debauch.
[UK]Farquhar Recruiting Officer IV iii: Rat me, I knew a famous doctor in London of your name!
[UK]Prompter 6 Feb. 2/1: Rat me, Sir, if you and your Basket-Maker are not a Couple of Impertinent Fools.
[UK]Fielding Tom Jones (1959) 280: Rat me if it was not a meritorious action to strip such a sneaking, pitiful rascal.
[Scot]Scots Mag. 1 Oct. 19/2: I had before made some progress in learning to swear: I had proceeded by Fegs, [...] ’pon my life, Rat it, and Zookers [...] to Demme.
[UK]T. Morton Way to Get Married in Inchbold (1808) XXV 13: Ha! ha! rat me! bet at last I’ve said a good one.
[Scot]W. Scott Heart of Mid-Lothian (1883) 309: Rat me, one might have milled the Bank of England, and less noise about it.
[UK]I. Pocock Woodstock IV iii: Now rat me, but that is too spiteful—eh!
[US]R.M. Bird Nick of the Woods I 59: For, rat it, I won’t own friendship for any such apostatized villains, no how.
[US]T. Haliburton Clockmaker II 250: Rat me if it don’t make me sick.
[UK]J. Bent Criminal Life 186: Rat it, but it does sting though!