slang. Also stumor. [Of unknown origin.] A forged or dishonored cheque; a counterfeit bank-note or coin; a sham.

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1890.  R. Marsh, in Blackw. Mag., June, 793/1. ‘Stumer’ is slang for a worthless cheque.

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a. 1897.  Sporting Times, in Barrère & Leland, Slang Dict., s.v., My collection of writs, pawn tickets, unreceipted bills, stumers [etc.].

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1897.  Hall Caine, Christian, IV. iv. 376. A ‘thick’un’? Oh, that was a sovereign,… twenty-five pounds a ‘pony,’ five hundred a ‘monkey,’ flash notes were ‘stumers.’

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1911.  A. G. C., Through a College Keyhole, 13. For Maeterlinck’s bird was a stumor, I’ve heard.

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1912.  L. Williams, in Daily News, 19 Dec., 7/4. I did pass a bad florin, guv’nor, but I did it innocent. I didn’t know it was a stumer.

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