Thoth in Greek was spelled "Θώθ", and since Thoth was the god of knowledge, it wouldn't be inappropriate to say "Θώθ, what's this?" You could also say "Begon Thoth!"
The more you know
I just finished Spy School secret service and it was AWSOME. Though it feels like Erica and Zoe switched roles. All I can say is its making me ship Berica >.<