Buck \Buck\, v. t. [imp. & p. p. Bucked (b[u^]kt); p. pr. & vb. n. Bucking.]

[OE. bouken; akin to LG. b["u]ken, Dan. byge, Sw. byka, G. bauchen, beuchen; cf. OF. buer. Cf. the preceding noun.]

1. To soak, steep, or boil, in lye or suds; -- a process in bleaching.

2. To wash (clothes) in lye or suds, or, in later usage, by beating them on stones in running water.

3. (Mining) To break up or pulverize, as ores.

Source: Webster's Revised Unabridged Dictionary (1913)