DuckCorp Dico

Found one definition

1.                 From The Collaborative International Dictionary of English v.0.48:
                   
   
   
                   
                     
   Hoof \Hoof\, v. i.
      1. To walk as cattle. [R.] --William Scott.
         [1913 Webster]
      2. To be on a tramp; to foot. [Slang, U.S.]
         [1913 Webster]
      To hoof it, to foot it.
      On the hoof, of cattle, standing (on the hoof); not
         slaughtered.
      beef on the hoof, live cattle.
         [Webster 1913 Suppl.]