shinplaster

noun

1. a plaster for the shin or leg.
2. Informal. (formerly)
   1. a piece of paper money of a denomination lower than one dollar.
   2. money of little value, as that issued on insufficient security.

noun

1. US, Canadian and Australian a promissory note on brittle paper, issued by an individual

n.also shin-plaster, piece of paper soaked in vinegar and used to treat sore legs, from shin (n.) + plaster (n.). In U.S. history, jocularly or as a term of abuse for “devalued low-denomination paper currency” (1824).