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Those little flies that buzz around public toilets...in really bad pubs, they fly around your beer...
"There are fucking piss flies in here!"

"This place is a shit-hole, look at the amount of piss flies".
by Skipton Levi October 22, 2008
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2
Small flies that circle arouind a dirty public toilet
Wow, did you see the number of piss flies in that bus stop toilet?
by cc millett March 14, 2004
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