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A practice that involves transporting prisoners back and forth needlessly from jail to jail or precinct to precinct. Named so because the cell looks like a bullpen, symbolically representing the fenced in area of a "bull's pen", where bulls wait before being sent off to the slaughter.
"Going from central booking in Downtown Brooklyn to Rikers Island is bullshit bullpen therapy!"
by SomeOneNYCz February 19, 2010