E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
A linen-basket. To buck is to wash clothes in lye; and a buck is one whose clothes are buck, or nicely got up. When Cade says his mother was descended from the Lacies, two men overhear him, and say, She was a pedlars daughter, but not being able to travel with her furred pack, she washes bucks here at home. (2 Henry VI., iv. 2.) (German, beuchen, to steep clothes in lye; beuche, clothes so steeped. However, compare bucket, a diminutive of the Anglo-Saxon buc.)