"Are you a girl?" also spelt "R U a Girl?"is a running gag between the Creatures but mostly Sp00n.
History[]
The phrase most likely originated around the time Sp00n joined The Creatures. He said it a lot on Creature Talk. It has been Sp00n's signature catchphrase since. It can both literally be asked, for example when someone calls in on Creature Talk, or just as joke said to anyone.
