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."