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.
â¢ BULLPEN (noun) The noun BULLPEN has 2 senses: 1. a place on a baseball field where relief pitchers can warm up during a game. 2. a large cell where prisoners (people awaiting trial or sentence or refugees or illegal immigrants) are confined together temporarily. Familiarity information: BULLPEN used as a noun is rare.