A competition in which two whores who take it in turns to perform sexual and often disgisting acts for a crowd to determine who is the bigger whore.
Jeff: "I'm a bigger whore than you! I've had sex with ten people at the same time!"
Jean: "I've done it with four goats!!!!"
A challenge, issued by one whore to another. It usually involves a public display of whore-ish skills or other related whore-isms.
Paris Hilton: "I challenge you to a whore-off!"
Mr. Slave: "You're on!"
Random Guy: "Whore-off!"