a very hard penis erectus, the main bone
After I gave her a poon smooch, I gave her the P-bone
by manbone April 12, 2007
A twisted pelvic bone which makes straight entry into the female vagina an impossibility. May also be used to refer to female genitalia in a derogatory manner.
After banging that chick my dick came out black and blue because of her stupid pbone
by Altima71 January 08, 2012