A plexipig is a term used by a man for a woman. All women are plexipigs, regardless of how alluring or how disgusting. This is somewhat of a derogatory term, similar to bitches. Also of note, this term is used most in describing a current female you are dating vs. just a random bar wench you come across.
All women are plexipigs. As a man, your goal in life is to find the plexipig that pisses you off the least. This is the plexipig you marry.