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.
Why do they call it a bullpen? A: There are many contradictory theories about the origin of the term bullpen in baseball. The most prevalent theory claims that the term arose because Bull Durham tobacco placed ads in every ballpark in the nation in 1910 and pitchers used the shade of the Bull Durham signs to warm up.