This is another name for "cops" or the "police". It is of hip-hop/rap culture origins, and is one of my favorite words. Hearing this word can often make one laugh as well.
(From Trick Daddy's THUG HOLIDAY)
"....what would I be without my guns? How could I get away from tha po-po's..."
The act involving the complete insertion of one's head into the uterus of a woman who's just given birth, detaching the placenta with a quick back-and-forth slashing motion. After pulling your head out, you wear the placenta for a period of 8 days.