Top Definition
When someone farts and it smells so bad it makes everyone want to get up and walk away.
Scott: Damnit did someone upfart?
Rick: Wasn't me (runs away)
Jon: Holy S*** (dies)
Sandy: (Sleeping, and is suddenly woke up by horrible smell)

Derek: (smiling)
by Schultzy235 July 03, 2009
8 Words related to Upfart

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