8
The close proximity around a person who has just expelled exceedingly unpleasant gases from their anal passage. Also the site of splashdown while offloading previous meals into the toilet.
"I'd give it five minutes mate, it's Ground Zero in there."

"Oh god, sorry mate, it's Ground Zero in my pants" (wafts in colleagues' face)
by RhythmJunky November 24, 2008
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9
where the dropping of one's bowels occurs. the height of the stink zone.
Dude, that is nasty!

Yeah bro, and you're just getting the second-hand smoke. It's 10 times worse at ground zero.
by jeremyf September 25, 2007
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