I don’t like the smell of...

[pacman000]

Fox Urine. (It's sold in granular form as an animal repellant.)

This was Rev's idea for a thread; thank you Rev.

[RCMerchant]

A cat  litter box.
Which brings me to my second choice- ammonia

[RCMerchant]

Fried liver. ugh.

[Alex]

Cat pee.

[The Burgomaster]

Ass. Except possibly my own.

[pacman000]

Burnt food.

[Allhallowsday]

cat p**s

[Leah]

Chicken blood

[retrorussell]

Grease traps.
Chicken farts. (from eating chicken)
Severe wood rot.
Fresh asphalt.
Weed.
Poop.
That skunk perfume that a lot of old women wear. (a total b*tch at work uses this)
Cigarette smoke.
Sulfur.
Deviled eggs.
Moth balls.

[pacman000]

Mold & Mildew

[LilCerberus]

Paper & paper dust

I was an apprentice binders assistant & newspaper inserter for too long

[bob]

deviled eggs

[ER]

Since cigarette smoke has already been mentioned, then unwashed hair.

[RCMerchant]

Dead skunk.

[Alex]

Morning breath.