The Collaborative International Dictionary of English v.0.48:

Vifda \Vif"da\, n.
   In the Orkney and Shetland Islands, beef and mutton hung and
   dried, but not salted. [Scot.] [Written also vivda.]
   --Jamieson.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Vivda \Viv"da\ (v[i^]v"d[.a]), n.
   See Vifda.
   [1913 Webster]