a sprat to catch a mackerel

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a sprat to catch a mackerel

BRITISH, OLD-FASHIONED
If you describe something you do as a sprat to catch a mackerel, you mean that it involves a small cost or amount of effort but it will bring you great rewards or benefits. Setting a sprat to catch a mackerel, the store is offering in its summer sale a chrome blender for £99 (was £149) to those who spend £50 or more. Note: A sprat is a type of small fish and a mackerel is a larger fish. Both fish may be eaten.
See also: catch, mackerel

a sprat to catch a mackerel

a small expenditure made, or a small risk taken, in the hope of a large or significant gain. British
A sprat is a small sea fish, while a mackerel is rather larger. The phrase has been in use since the mid 19th century and is also found with whale in the place of mackerel .
See also: catch, mackerel

(be) a ˌsprat to catch a ˈmackerel

(informal) (be) a fairly small or unimportant thing which is offered or risked in the hope of getting something bigger or better: The competition and prize of a free car is a sprat to catch a mackerel. The publicity will mean good business for months to come.
Sprat and mackerel are both types of fish. Sprats are very small.
See also: catch, mackerel