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1.
The trifecta of solid, liquid, and gaseous matter that is violently ejected from the body after consuming large amounts of alcohol and/or food high in fat, grease, cholesterol, and bliss.
After an indulging lunch of 5 Guys burgers and fries, Erik found himself running to the bathroom to release his schmog.

see also schmogging
by Lord Smitty March 02, 2011
 
2.
1) Something you say when there is a long silence in a room or if nothing is going on.

2) Something you say when you can't think of a word. Much like thingamajig.
1) (long silence) Schmog.

2) Damn look at that schmog over there.
by NigMcNig October 06, 2008