The Collaborative International Dictionary of English v.0.48:

Huckaback \Huck"a*back\, n. [Perh. orig., peddler's wares; cf.
   LG. hukkebak pickback. Cf. Huckster.]
   A kind of linen cloth with raised figures, used for
   towelings.
   [1913 Webster]

WordNet (r) 3.0 (2006):

huckaback
    n 1: toweling consisting of coarse absorbent cotton or linen
         fabric [syn: huck, huckaback]