bull pen

noun
1.
Baseball.
  1. a place where relief pitchers warm up during a game.
  2. the relief pitchers on a team.
2.
Informal.
  1. a large cell or room, usually next to the courtroom, where prisoners are temporarily held.
  2. a large room in an office occupied by many employees.
3.
any temporary or crowded quarters, as sleeping quarters in a lumber camp.
4.
a pen for a bull or bulls.
Also, bullpen.
Origin
1800-10, Americanism for def 4; 1920-25 for def 1
Examples from the web for bull pen
  • No one should enter a bull pen when the bull is loose.
  • The crowd in the bull pen was quite large yesterday, and the elements were varied.
  • Unlock him at seven in the morning, and let him come to the bull pen.