corned beef

noun3

1. •
   Smoke-cured and salted beef.
2. •
   Beef conserved in tins (cans).
3. •
   (UK, slang) The chief officer of a prison.

   • Steve and I raced for the building and began climbing the wall, before any of the screws knew what was happening. […] The Corned Beef came out first and initiated the ploy to get us down. — 1999