The Collaborative International Dictionary of English v.0.48:

Tabby \Tab"by\, v. t. [imp. & p. p. Tabbied; p. pr. & vb. n.
   Tabbying.]
   To water; to cause to look wavy, by the process of
   calendering; to calender; as, to tabby silk, mohair, ribbon,
   etc.
   [1913 Webster]