PO 

It is a city. The city of Pomona in California.

I went to the PO to check out the Arts Colony.

PO by martha March 24, 2004

Po 

pissed off

you are so annoying, po.

Po by lexi November 13, 2003

po 

5-0, or POlice.

Check your six, po.

po by RED December 4, 2002

po 

short for "hippo" or "hippopotamus"

I got this cute little 'po to add to my figurine collection!

po by Judypotamus March 27, 2003

PO 

The object, or document to which an OG requires in order to measure up to a YG. For an OG, this oject is very rare.Infrequently occurring; uncommon: a rare event; a document that is rare in this region of the OG.
Excellent; extraordinary: a rare sense of honor.
Thin in density: rarefied: rare air.

PO, Quote, Big Deal, Large Op, Bid, rfp, rfq, etc.

PO by Jordan March 15, 2005

Po 

Further slangification of "p.o", an abbreviation of "Post Office".

"I'm going to check the po to see if I've got any college mail."

Po by ThatsMyKit June 16, 2005

Po 

Stands for poor. Also can apply to a young guy who's going bald and looks like a pile of steaming shit.

he's so po he couldn't afford to buy a vowel.

wow, check out that receding hairline and the guy is only 20!

Po by poop man i9 January 27, 2009