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A collective term for when a group of people (e.g. family, work colleagues) who are co-located suffer from a bad cold that results in copious sneezing and excessive nasal mucus.

Basically, a festival of snot.
We were supposed to go to Alton Towers at the weekend but the family had a snotfest so we had to cancel.
by tony21 December 11, 2007
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