shrinkage

noun3

1. •
   The act of shrinking, or the proportion by which something shrinks.
2. •
   (slang) The reduction in size of the male genitalia when cold, such as from immersion in cold water.

   • Do women know about shrinkage? — 1994
3. •
   The loss of merchandise through theft, spoilage, and obsolescence: the shrinking of inventory.