Word of the day: frisson.

My brother's definitions are funnier, but...

fris·son ( P ) Pronunciation Key (fr-s)
n. pl. fris·sons (-sz, -s)
A moment of intense excitement; a shudder: The story's ending arouses a frisson of terror.

The context: from the Christian Science Monitor:

February 23, 2004 edition

New wild card: Nader joins race

The consumer advocate announced his candidacy Sunday, on the heels of Dean's withdrawal. Democrats are chagrined.

By Linda Feldmann | Staff writer of The Christian Science Monitor

WASHINGTON – Ralph Nader has sent a frisson of anxiety through the Democratic Party by announcing he will run for president.
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Ralph Nanny's gonna save us all.

Update: I got the definition from Dictionary.com.