Someone who swindles you by not repaying a debt or wager

Usage examples of welsher.

Stephen, giving the cry, and a tag and bobtail of all them after, cockerel, jackanapes, welsher, pilldoctor, punctual Bloom at heels with a universal grabbing at headgear, ashplants, bilbos, Panama hats and scabbards, Zermatt alpenstocks and what not.

He said welshers, no matter who they were, usually had a bad time of it, if I knew what he meant, and I did.

I crashed the eye, shooting it for no apparent reason except that it might find out where I was going, and he decided that whatever I was doing had to be a hell of a lot more interesting and important than strong-arming welshers for the Ginza, which was his main source of income at that point.

I say again that, if the ring has fallen low, it is not in the main the fault of the men who have done the fighting, but it lies at the door of the vile crew of ring-side parasites and ruffians, who are as far below the honest pugilist as the welsher and the blackleg are below the noble racehorse which serves them as a pretext for their villainies.

The rest of the afternoon, weaving north through Monterey Park, Rosemead, Alhambra, Temple City, Arcadia, you meet with varying success, but catch a few welshers in Pasadena during the early evening, around dinnertime.

I think you're not only a dago shit bag and a welsher but a yellow cunt, too.