Is it okay to welch on a financial commitment? Yes, I know that 'welch' is a gambling term - and we're about to talk about mortgages. If an unproportional amount of recent mortgages were actually bets that house prices would continue to increase, maybe 'welch' is the right term after all? Anyway, Pew recently polled people to ask their opinion on the practice of 'walking away' from mortgages.