Top Definition
PJO
Percy Jackson and the Olympians is a popular 5 book series by Rick Riordan. Please disregard the movies because they suck ass.
Have you read the PJO series? If you haven't then you should because they're fucking awesome!
by _.idk September 07, 2015
1. An acronym that stands for Portable Jack Off Station. This term refers to using a laptop computer for the sole purpose of downloading and jacking off to porn where ever one travels. PJOS is pronounced "Pee-Joss"

2. The acronym can also stand for Pocket Jack Off Station if the electronic device being used for pornographic satisfaction can be fit into one's pocket. Such devices include cell phones and PDAs.
"I went out of town without my girlfriend, but stayed busy with my PJOS"

"Because my job is really boring, I pack my PJOS with me and take many bathroom breaks"
by No. #1 Stunna September 17, 2006
PJO
PJO refers to the 5 book series Percy Jackson and the Olympians by Rick Riordaout greek mythology.
On some sites this also extends to the spin off series about Roman mythology Heroes of Olympus (HoO).
The two books narrated by Percy Jackson but not really connected Percy Jackson and the Greek Gods and Percy Jackson and the Greek Heroes as well as Percy Jackson the Demigod Files and Heroes of Olympus the Demigod Dairies.
The spin off trilogy about Egyptian mythology The Kane Chronicles.
The Kane Chronicles/Percy Jackson crossover short e books which is now 1 book called demigods and magicians.
The spin off about Norse mythology Magnus Chase and the Gods of Asgard
The spin off series coming full circle back to greek with Trials of Apollo.
"Omg did you hear? Rick Riordan is writing a new PJO book!"
by Laughing.Thalia June 08, 2016
Post Jerk-Off Serenity
Man, I JO'ed earlier and I have such PJOS now that I can barely stay awake.
by El Negro June 26, 2003
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