What smell, in your opinion upsets your nose the most?

[Reborn]

Self explanatory title.

Let me start off by saying ammonia is the most repulsive smell that a human being could ever smell in his/her life. For god sake why was ammonia invented. For me the revolting smell of ammonia blocks my nose, makes me hazy, my eyes start to water etc

Just post here if you think you have ever smelt anything that could ever beat the strong nauseate smell of ammonia.(I feel sick just typing the name!)

[Not Safe For Adults]

I really hate the smell of perfume. It gives me a headache almost immediately. Scents need to be really subtle in shampoos and such for me to be able to put them on my body.

[Typhlosion Explosion]

Balsamic Vinegar. Whatever kind my teacher used, oh god. It was terrible.

[Pokemon Trainer Sarah]

Bleach, probably. My mum uses it to clean the bathroom. I'd rather smell the bathroom. XD

We also have to use it in the lab to kill cells/bacteria before throwing them away. Yuck.

Edit: Also raw meat/fish. The zoology lab is right near my office and they're always dissecting something that stinks. Nausea-inducing for sure.

[Velocity]

Either the stench of vomit or the reek of fresh coconuts, depending on the day. Both of them turn my stomach over, which is more than 99% of things can.

[Teddiursa of the Sky]

Bleach. It is one of the few smells where I will actually feel physically sick.

[Obliveon]

One word. Pondwater. I don't mean the regular pondwater that you smell in an actual pond though. I mean the Pondwater in the biology class's Pondwater Lab. I nearly threw up every day for two months.

[Socratic Sarcasm]

Robitussin. Robitussin is EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEVI LLLLLLLLLLLLLLLLLLLLLLLLLL!!!!