log smog

A cloud of gasses that escape the anus by passing by a fat turd on the way out and retaining the essence of defecation. Also referred to as PPFs

The steamy cloud of rancid ass-gasses left in a bathroom after dropping a hearty dougan. See also log fog.

Don't breathe through your mouth, bro. You'll get a mad taste of that log smog.

Smog Log

A greasy turd.

Example:
"Dude, I ate so many Slim Jims. It was a whole Smog Log.

I took a fat Smog Log