Durian fruit

definitely rotting potatoes, and rotting onions comes in 2nd.

My ex-fiance's gramma used to make some crazy dish with ground turkey in it.  I don't know what the heck she added to it or what she did to it but I could not go into her house when she was cooking it.  It smelled so bad I couldn't stand it. 

Liver and onions....yuck.......

I hold my breath when I have to walk past the sushi bar at the mall. That "raw" smell is so sickening to me.

Anything that comes out of the rotter. That is what my husband calls the Veg. drawer in the frig...lol...You sometimes put something in there and forget about it, it doesn't seem to keep the food fresher, just rotts  quicker to him. 

For me, I do not know what Lipton side dish it was, but when I was pregnant with my son, I was pretty much sick all day. My Mom made one and still to this day...26 years later, when ever I smell it, it makes me gag! I guess it's just the memories, but yuck!

Kidney stew which I smelled once. 

Words cannot describe it.

You DON'T want to go there!

Without a trace of doubt I'd say "Thousand Year Egg".  It's commonly eaten in China.  The ammonia/sulphur smell of the yolk was unbearable to this nose.  But not wanting to be rude to my host, I ate it.  The taste?  Clearly not worth the smell!

Chitterlings

tomato juice esp on breath when someone has been drinking that

Shiitake mushrooms 

My husband frys tuna fish in a frying pan then adds eggs to it.  THAT is the worst smelling food that I have ever smelt.........NASTY!!!