Said by one, in recognition of a
contradictory, absurd or nonsensical statement made by another.
Example-
"I've abandoned free market principles to save the free market system."
George W. Bush, (Washington, D.C., Dec. 16, 2008)
Commentator – “... and he’ll have a black coffee, with milk!”
Originated in a Sainsbury's
coffee shop in Weston-Super-Mare, circa 2010, whilst observing a stupid, bald Brummie’s beverage order.