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
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
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
Pilot: "what about the hydraulics?"
Mechanic: "It's PBO"
by Kurt May 15, 2004
"Please be okay."
Judy: Dude I just got hit by a car!
Michael: Omg! PBO!
by Fabulous Skater Boii March 18, 2017
short text or respond for "Playing Black Ops when you cant text the whole thing out when your in the middle or a match or zombie game.
person1- "yo that one trick keep textin you"
person2- "tell that bitch im in the middle of a game of Team death match"
person1- "nah man thats too much to text"
person2- "just put PBO"
person1- "what the fuck that mean?"
person2- "Playing Black Ops"
by moosebeesmokin420 September 16, 2011