Green’s Dictionary of Slang

capot me! excl.

[piquet jargon, capot, to score a capot against, to win all the tricks from. In this context ‘to score off’]

a general excl.

[Dryden Feign’d Innocence (1701) 193: If I go to Picquet, though it be but with a Novice in’t, he will picque and repicque, and Capot me twenty times together].
[UK]Foote The Minor 32: Capot me, but those lads abroad are pretty fellows.
W. Tone Journal 1 Sept. (1826) 441: Capot me, but it wears a face.
[Scot]Scott Bride of Lammermoor (1844) 132: ‘Capot me if I think that was according to the rules of the game,’ said his confident.