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When one passes gas/farts/toots/etc so severely that it seems to change the density and consistency of the air.
"Man, that fart was so nasty it created some rectal smog! There's even a haze!"

"These beans are going to help me release some rectal smog..."
by James the Crippler April 23, 2008
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Sep 16 Word of the Day
(noun) A successful type of theft which results in an acceptable, impressive and rewarding payday for the protagonist.
Last night, hit a good lick. I brought home three figures easy for about two hours worth of my time. Not too bad I don't think.
by Nikki Stixx January 18, 2021
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