Top Definition
When 2 or more people are taking a dump in a public restroom... The resulting combined odor, when detected by the olfactory glands of anyone present causes them to see a "brown flash".... Similar to a nuclear criticality ....both are caused by a critical mass of "PU".
Pete is no longer allowed to poop in our restroom when someone else is already in there...he has caused too many people to experience a shiticality induced brown flash due to his high fecal enrichment.
by Doc184 June 06, 2013
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