Holding cells were called "bullpens" because police officers were at the time called bulls. Bullpens are still the name inmates call holding cells. You are held in the bullpen at county jail until the bus takes you to court. At court you are held in another bullpen until you are called in front of the judge. Then you are escorted back to the bullpen and are held there until all the inmates are called in front of the judge. Then everyone is escorted back to the bus and sent back to county jail where you sit in another bullpen until you are escorted back to your housing unit.

When a reply to a tweet gets more likes than the tweet it was replying to, usually indicating the unpopularity or stupidity of the original tweet

1. In baseball, the bullpen (sometimes referred to as just "the pen") is the area where relief pitchers warm-up before entering a game. Depending on the ballpark, it may be situated in foul territory along the baselines or just beyond the outfield fence.

2. It also refers to an office workspace populated with desks but no separating cubicles or walls.

in dating, this is a lineup of associates who specialize in your tastes. as in baseball the manager needs a starting pitcher, middle reliever and a closer. in dating, some people various have fetishes and tastes. a bullpen satisfies an individual's various sexual needs. a bullpen is also a good way to keep a man from becoming pussywhipped.

A bullpen is a rotation of women started by Grant Sisk. The basics of the pullpen consist of the alpha female (#1) in the rotation, two supporting aces (#2 & #3) and two relievers (#4 & #5). The alpha female is the go to at all times, but if she isn't available, the skipper will move down the totem pole.

WARNING: IF YOU START A BULLPEN IT CAN CONSUME YOUR LIFE. ADVISE AGAINST STARTING A BULLPEN WHEN YOU HAVE A LOT ON YOUR PLATE

When someone is in a relationship and actively lining up a new one.

along with sexual progression euphemisms associated with baseball (first base: making out, second base: hand job, etc.), bull pen refers to a one night stand where one's perception is sub-standard, either due to intoxication, THC, or overt horniness, and the subject has sex with a very very unattractive person.