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1.
P1
A P1 is a fan of Dallas/Fort Worth-based radio station 1310 AM, otherwise known as "The Ticket".
"Hey man, did you listen to Bob and Dan the other day?"
"Of course I did, you know i'm a total P1
by studlywonderbomb January 17, 2012
 
2.
P1
Noun.

As in parking level 1. Sketchy, poorly lit, parking area (i.e. the bottom level of a parking garage) where men go to perform promiscuous sexual acts on other men. The encounters must be completely anonymous in order to qualify under this definition.
"Yo JoeG, what are yo plans for today?"

"I have a meeting with the client, but then i'm gonna hit up P1 for some S&S"

"Joe, you is one Brokeback mothafucka"
by Eddy N March 08, 2006
 
3.
P1
Turnt. When the level of alchohol in your system is enough to sedate 7 rhinos, 4 black panthers, 18 baby koalas, and 2 school bus full of chimpanzees.
Dude the party last night was so crazy. I went P1 and blacked out.
by Dragon Cider September 25, 2014
 
4.
p1
P1 means Peace 1 love, actully the definetion came from when Leo and One of his homeboys were in DC, Instead of People saying Peace or 1, Leo decided to say P1, as in Peace 1 love
AJ:yo nukka im out
Leo:p1
AJ:Peace
by Fspace119 February 01, 2008
 
5.
p1
p1 means peace. For use when saying goodbye to someone. No one knows why it means peace, or who started it exactly. Rumor has it that it spawned from the quake 3 1.16 freeze community.
Person1 : fuck man im out
Person2 : aight, p1, later
by travisx201x January 10, 2006