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1.
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!"
by punkbass_20x6 March 30, 2006
 
2.
a Whore off is a competition to see how many people you can snog bbefore the other person, the person with the most snogs is the biggest whoe and wins the compitiion
"wanna whore off?"
"sure"

2 hours later

"how many people?"
"60 u?"
"62"

"you win ¬¬"
by shamonneeeeeeeeeeeee February 07, 2010
 
3.
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!!!!"
By-Stander: "WHORE-OFF!!!!"
by Harry Manwhore April 07, 2006