olfactory "hallucinations" 

When you smell something that really isn't there.

I've had many olfactory "hallucinations" like when I smell mustard & there's none around!

olfactory "hallucinations" by Starchylde December 11, 2016

olfactophilia

Sexual arousal caused by body odor. The most common areas that cause arousal in people with Olfactophilia are the pubic area, asshole, armpits, under boobs, and feet. These people are not usually aroused by odors such as passing gas or burping.

Person 1: Hey man I think I have Olfactophilia.
Person 2: Huh really?
Person 1: Yeah well I was having sex with my girlfriend yesterday and I couldn't stop smelling her armpits, they were so sweaty and had a sour musk to them.
Person 2: Whoa... that's pretty weird man...
Person 1: Don't judge me Frank, you have Necrophilia!
Person 2: Shh.. okay okay... keep it down....

olfactophilia by Space Dildo November 9, 2017

olfactophilia

The result of being aroused by someone's body odor.

"Hey Maria, I'd love to smell your armpits after you come back from the gym..."
"Serious?!"
"Yea Maria! It's your lucky day, I have olfactophilia."

olfactophilia by wordwanker September 16, 2018

Fecal-Particulate-Olfactory-Simulation 

Fecal Particulate Olfactory Simulation, or FPOS, is the process through which one is able to experience a fart.

I was on an escalator and was downwind of someone letting one rip.. it was the worst FPOS ever... I couldn't escape it.

Fecal-Particulate-Olfactory-Simulation by Yokes April 7, 2005

olfactory rape

Being subjected in public to any offensive odor, i.e., bo, cigarettes, cigar smoke, barn boots, farts, unwashed, unbathed bodies, etc.

At this weekend's fiber festival, I was the victim of olfactory rape by a clearly unbathed individual who was also covered with third hand smoke.

olfactory rape by Lemondrop Mangosteen September 28, 2009

encopretic olfactory hallucinations 

A description of the neuropsychological disorder wherein a person erroneously believes they have shit themselves.

Sadly, during his early childhood while visiting his dad in prison, Jared was dropped squarely on his head and ever since this unfortunate event he’s been having these disruptive encopretic olfactory hallucinations which has caused him to wear the now familiar “Kushner shit smelling face.”

encopretic olfactory hallucinations by Dr Bunnygirl June 15, 2020

Olfactorithmetic 

The ability to glance at a document and announce "This number smells wrong". It is not necessarily correlated with the ability to show workings as to why it's wrong. Those who have cultivated olfactorithmetic abilities may need to ask a colleague to calculate, but often the numbers their noses identify turn out to stink."

THE BBC, Mike Moore observes, isn’t universally blessed with the ability to detect numbers that smell wrong, or olfactorithmetic.

Olfactorithmetic by ProcessMaster July 28, 2014