A sexually promiscuous
woman.
Entymology: From the term "Pot-Luck" referring to a selection of dishes provided for a celebration.
Connection: A sexually promiscuous
woman presents herself to "the
table" (the group of people), and is available to everyone.
"
Don't sleep with her, she's a total pot
luck."
"Ah, I slept with this total pot luck last
night."