Definitions by Mattias the 1

Simfrosibvru 

An expression of utter disbelief, or exclaimed in a state of bewilderment or confusion. The word has French roots, but was distorted by general usage.

John: "Dude, your car just exploded!"
Austin: "Simfrosibvru!!"

Simfrosibvru by Mattias the 1 April 22, 2011