A piece of paper money issued privately and devalued by inadequate security or by inflation.
A piece of paper money of small denomination issued by the government, especially one issued by the US government from 1862 to 1878.
A plaster or poultice for use on sore shins.
(historical, US, Australia, and New Zealand informal) An essentially worthless note of paper money.
(historical, Canada informal) A 25¢ banknote.
Origin of shinplaster
- From its resemblance to paper used in plasters for sore legs
From American Heritage Dictionary of the English Language, 5th Edition