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.
by Ian Wetzel September 18, 2004

Guy1: You know Justin Bieber?
Guy2: Yeah, what about him?
Guy1: He won the Artist of the Year award the other day.
Guy2: What?! That's such bull-to-the-junkie.
Guy2: Yeah, what about him?
Guy1: He won the Artist of the Year award the other day.
Guy2: What?! That's such bull-to-the-junkie.
by MrCybrody January 12, 2011

by Klitman April 22, 2006

by Twiz August 23, 2005

by Oak Squad August 17, 2018

by varg verse May 13, 2005
