Top Definition
When someone goes to the toilet for a number 2 and spends a long time in there, the smell marinates so that when they open the door, a poophoon engulfs the corridors and the surrounding victims.

For some unknown reason, the person who caused the poophoon is immune to it's effects.
Kim just came out of the toilet and let loose a poophoon upon us.
by x2i August 16, 2012

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