\Buck"ing\, n.
1. The act or process of soaking or boiling cloth in an
   alkaline liquid in the operation of bleaching; also, the
   liquid used. --Tomlinson.

2. A washing.

3. The process of breaking up or pulverizing ores.

{Bucking iron} (Mining), a broad-faced hammer, used in
   bucking or breaking up ores.

{Bucking kier} (Manuf.), a large circular boiler, or kier,
   used in bleaching.

{Bucking stool}, a washing block.