n.

1. 【英】（英国过去的货币，现已不用）四分之一便士[C]
2. 一点儿；极少量[S]
   He doesn't care a farthing.

   他毫不在乎。

n.

1. a former monetary unit and coin of the UK, equal to a quarter of an old penny.
2. [usu. with neg.] the least possible amount.