1 definition by Webster, Merriam

Top Definition
1) (n.) A manner of extremeness which is to the limit.

2) (adv.) To bring one's extremeness to the limit, i.e. "to 11".
1) "I sincerely hope you did not just call into question the depth of my furiosity."

2) "And verily, was he smokethed with great fastness and extreme furiosity."
by Webster, Merriam May 11, 2005
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