Definition of bucking:
(n) :
The act of a quadruped kicking both hind legs upward at once.
(n) :
(forestry) The process of cutting a felled and delimbed tree into logs.
(n) :
The act or process of soaking or boiling cloth in an alkaline liquid in the operation of bleaching.
(n) :
The liquid used in this process.
(n) :
A washing.
(n) :
The process of breaking up or pulverizing ores.