Stands for: Penis Break Out.

Defined as when a dude has a boner
Wow, did you just see Rick? He had a PBO when you were talking to him!
by lowielawlperson January 15, 2011
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Pussy body odor. The lingering smell of pussy on your face after going down on a woman, deliberately left there as a lingering reminder of the encounter.
I was on the metro last night and the guy next to me reeked of PBO.
by Kev1057 February 6, 2021
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Pilot: "what about the hydraulics?"
Mechanic: "It's PBO"
by Kurt May 15, 2004
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Prime Bagging Opportunity (or PBY, Y being years)
when a guy is say 32 years old he would be in his Prime Bagging Years or have a Prime Bagging Opportunity to bang women from the legal limit to say 50 years old. Any older and they chicks do not fit into the PBO / PBY model.
by areyoukiddingme August 21, 2009
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PBO is “Pretty Bitches Only” a group of 5 to 6 girls friends that go out clubbing/partying .
girl: omg you see the group of PBO in the v.i.p section .. i would kill to be in their friend group
by bluhi March 6, 2020
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"Please be okay."
Judy: Dude I just got hit by a car!
Michael: Omg! PBO!
by Fabulous Skater Boii March 18, 2017
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