1857, racing slang, "to refuse or avoid payment of money laid as a bet," probably a disparaging use of the national name Welsh. Related: Welched; welching.
Welch (wělch, wělsh), William Henry. 1850-1934.
American pathologist and bacteriologist who discovered the bacteria that causes gas gangrene.
: Link can't take a welsh, so he looks around for a way to get his dough
verbTo default on or evade an obligation, esp paying a gambling debt: Say, are you going to welsh on me?/ Some American officials feel that the Syrians welshed on their promise (1857+)
[apparently fr the same bigoted stereotype of the Welsh reflected in the English nursery rhyme ''Taffy was a Welshman, Taffy was a thief,'' although perhaps a borrowing of German Welsch, ''foreigner'']