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Something scary. Really scary. Something so unbelievably scary, the 'e' in monster was downshifted by three vowels to 'u' in order to represent the degree of scariness of the thing in question.
AHHHH!!!! MONSTUR!! *bashes it with a stick*

The monstur on Trisha's card was super scary.
by Scary Monstur October 04, 2005
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