The probability of finding many attractivefemales at an event ; the expected hot girl to guy ratio at a social gathering...usually checked before deciding if one should actually attend or not.
John: "are you guy's interested in going to Justin's party tonight?"
Chris: "I don't know, what's the expected whorecast look like?"
When by virtue of her behavior it is unquestionably clear that a friend's or family member's youngdaughter is going to be a complete whore when she grows up. Typically a shared observation that one only verbalizes when another person is brave enough to broach the topic.
Paul: Hey man... have you and Bonnie had Robbie's daughter over to play with your daughter? How'd that go for you?
Gene: Yeah man it's alarming.... I gave Bonnie the whorecast on that one - I guess we'll see.