While Jordan Belfort was in prison for securities fraud, he began writing the book that would become Martin Scorsese's Oscar-nominated movie. This story first appeared in the March 7 issue of The Hollywood Reporter magazine.
Freebase(0.00 / 0 votes)Rate this definition: In baseball, the bullpen 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.
The origin of the term bullpen, as used in baseball, is debated, with no one theory holding unanimous, or even substantial, sway. The term first appeared in wide use shortly after the turn of the 20th century and has been used since in roughly its present meaning.