Top Definition
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
5 Words related to Rectal Smog

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