Underground nickname for a restaurant/club in East Hampton, NY named Boathouse. The term Boatwhore came to be due to the unbelievably gorgeous women whom accompany wealthy douche bag looking men to the establishment.
Guy 1 - "Hey... what are you doing tonight?"
Guy 2 - "I don't really know, I was thinking of going out."
Guy 1 - "Hey, you want to go down to Boatwhore?"
Guy 2 - "Sure, we can check out the girls with the douche bag yuppies."