Nausea is a feeling as if you're about to vomit. Vomiting usually relieves this feeling. Nausea is not self-induced like vomiting sometimes is. Nausea is your body's response in saying "I don't like whats in my stomach."
I had too much chinese food; i was overcome with nausea.
by xxyuli August 23, 2006
A nasty feeling that usually leads to vomiting. This feeling sends an unusual taste through the mouth causing it to water and results in a look of disgust.
I feel so nauseated that I think I'm going to vomit !
by *waterlover* March 4, 2009
The prolonged period of overall discomfort experienced by someone who is nauseous and has an upset stomach, but does not gain relief of their symptoms and overall discomfort via vomitting.
"I spent all night in Nausea Purgatory," said George, "If I had thrown up I would have felt better, but I just stared at the porcelein looking glass, waiting for relief that would never come..."
When you're watching a whole night of TV on the same network and you see the same ad roughly 9387493 times, you suffer from ad nausea.
Barbara suffered from ad nausea after seeing the same TV ad 98732438 times in one night.

Barbara: OMG! This is the 26th time I've seen this ad tonight!
Katy: You must be suffering from ad nausea.
or
Barbara: OMG! This is the 26th time I've seen this ad tonight!
Katy: Hmm you should see a doctor. That sounds like ad nausea.
by Euroame September 17, 2007
Having a low grade case of sociopathy that does not present with any physical actions or violence. Just verbally insane.
Him: Hey, your friend just said he was going to rip my trachea out!
Me: Don't worry, he won't actually do anything he just has a case of psychological nausea.
by Blair&Zac December 12, 2017
1. The unpleasant sensation individuals may feel after reading certain Facebook users' posts which boldly state some sort of sickening information you did not need to know, this can include informations generally regarded as revolting, but Facebook nausea is a more befitting description of the reactions some users experience after reading updates about "gorguz" children, or this common person known as "my man" and all that purile stuff single, childless people of the world cannot understand, or perhaps do not even have any desire to understand.

It may also result from viewing the effects of Facebook anti-ageing serum.

2. The effects of accessing Facebook via iPhone or similar when travelling in some sort of moving vehicle.
1. Facebook User U reads the following status update:

"FACEBOOK USER K is getting knocked around in the belly! Little man is going off this morning,he must be getting into the soccer spirit!"

Facebook User U feels an unpleasant sensation in their own abdomen area and an excess of saliva building up in their mouth resulting in an urge to run to the nearest receptacle and eliminate all contents of their stomach.

These consequences of Facebook User U reading Facebook User K's status update, and any other similar unpleasant sensations resulting from Facebook use are known by the umbrella term of "Facebook Nausea".

2. Facebook User Q is in the passenger seat of her buddy's 1988 Mazda 626 and is accessing Facebook on her iPhone instead of conversing directly with her good buddy. As a result of this unecessary and somewhat rude accessing of a social networking site in a car, Facebook User Q begins to feel unwell, and turns to their buddy and this exchange follows:

Facebook User Q: Oh, dude, Facebook Nausea...

Good Buddy: You gonna use that shit in my car, you gonna suffer the effects of your anti-social behaviour!

Facebook User Q: Fairy nuts, sorry bout that buddy. So where we actually headed?
by Coop-Dogg September 26, 2009
The feeling of sickness you get when you think of something repulsive, either repulsive at the moment or always disgusting.
During the soccer game, Lizzie thought of lukewarm milk and felt like retching from mind nausea.

On the long car trip, Bob thought of smelly eggs and got extreme mind nausea.

Jeremy thought of the vomit he had seen and mind nausea kicked in.
by Tah-blooee September 1, 2007