Where did welsh on a bet come from?

The phrase "to welsh on a bet" originates from the practice of not paying debts or honoring bets, with the term "welsh" historically linked to the Welsh people. It is believed to have emerged in the 19th century, particularly in gambling contexts, where it was used to imply that someone was avoiding their obligations. The term is considered offensive today due to its derogatory connotations and stereotyping of the Welsh.