'Stocker' definitions:

Definition of 'stocker'

From: WordNet
noun
A domestic animal (especially a young steer or heifer) kept as stock until fattened or matured and suitable for a breeding establishment

Definition of 'Stocker'

From: GCIDE
  • Stocker \Stock"er\, n. One who makes or fits stocks, as of guns or gun carriages, etc. [1913 Webster]