Catchphrases
Boris's main catchphrase (spoken when frustrated) is "Raskolnikov!" (a reference to the novel Crime and Punishment by Dostoevsky), spoken in his Pottsylvanian accent (a mock-Russian accent).
Boris would also say, "Sharrup you mouth!" to Natasha when his schemes failed. However, in the final segment of "Greenpernt Oogle", when he and Natasha were stuck in their own mine field, he says to her, "Natasha, next time I get fiendish plan, do me big favor? Sharrup my mouth!" She does indeed do this in one episode, saying those very words to Boris as the car they were in dropped over a cliff to the ground in the 8-segmented story arc "The Treasure of Monte Zoom." Also, whenever his superior gives him an order, he utters the line "You sair it!"
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