Buck, v. t. [imp. & p. p. Bucked (bkt); p. pr. & vb. n. Bucking.] [OE. bouken; akin to LG. büken, 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.