On Sat, 23 Jan 2010 19:04:36 -0700, Winston_Smith
wrote:


The original is to Welsh on a bet/deal. Not to keep a commitment.
Not to honor ones word. It is was I wrote, an English slur on the
Welsh at a time of friction between the two countries centuries ago.

Not according to the OED, which says the origin is obscure.

--
Ned Simmons