all Lombard Street to a China orange

all Lombard Street to a China orange

Very probable or likely. London's Lombard Street has long been associated with the banking industry, while a "China orange" is considered an ordinary, unimportant thing. We'll definitely be able to beat the worst team in the league—it's all Lombard Street to a China orange.
See also: all, china, orange, street

all Lombard Street to a China orange

great wealth against one ordinary object; virtual certainty. dated
Lombard Street in London was originally occupied by bankers from Lombardy, and it still contains a number of London's principal banks. This idiom dates from the early 19th century, but the use of a China orange to mean ‘a worthless thing’ is recorded earlier.
See also: all, china, orange, street
References in classic literature ?
They may well be angry, for it is all Lombard Street to a china orange that the School-house kick a goal with the ball touched in such a good place.
7 as prospects of anything lower than 62 (ten under par) are small and you certainly would not want to buy in the prevailing conditions as it's all Lombard Street to a china orange that there will be a few 64s.