The mell of mildew--like on dish rags. I swear, I can smell it from half way across the room. And the smell doesn't come off your hands after washing them...multiple times.
Eggs that have not been fully cooked, so bits are still runny or they're still "wet" (scrambled eggs).
Men with long fingernails. *shudder*shudder*shudder*
The smell of chicken in the trash can after a day.
The smell of turkey when it first starts roasting.
Plastic containers that haven't been washed. They don't have to sit for along time--lunch time til when I get home is enough to squick me out.
Edit to add: The smell of dogs that's left on your hands/clothes/whatever after you touch one. Hate, hate, HATE dog smell. Worse if they're wet, but hate regular dog smell. And it leaves your hands feeling strange. Eeew.