welsher

He was a swindler, a welsher, a cad, and a rogue.

Still, if I could catch him, it would take more than Condy’s Fluid to disinfect that pea-green welsher after I’d done with him.”

He vowed I was a low down swindler and a "welsher," whatever that is.

The arm of the law has been found long enough to punish as thieves “welshers,” who receive and make off with deposits on bets which they never mean to pay if they lose.

Those of the High Mob were the flourishing practitioners in burglary, the mag, the mace, and the broads, with an outer fringe of such dippers—such pick-pockets—as could dress well, welshers, and snides-men.