Bitchisity 

The level of disparity in hottness of a girl between two time periods based on natural selection.

The natural selection theory is based on the hypothesis that hott girls with be chosen by dudes more often, and will not work as hard to maintain their looks, becoming ugly. Reversely, an ugly girl will work hard to get laid and become hott.

High Bitchisity + Hott = Bad; Low Bitchisity + Hott = Good
High Bitchisity + Ugly = Good; Low Bitchisity + Ugly = Bad

"Man, that bitch is hott... but she's got a high bitchisity, so fuck that (for about a year, then bail)."

"My wife is hott! and has low bitchisity, so I'm assuming our sex life will stay pretty active."

"Eh, that ugly chick has got potential for a high bitchisity, ill just get wasted first..."

"Uhh, I'm so ugly, and my bitchisity is so low.... i wonder if they make solar powered vibrators."

Bitchisity by drofjournalsm April 3, 2010

Bitchasitis 

(pronounced bitch-us-itis)

A disease to which any human of the female gender may fall victim; an inflamed bitch in the vernacular.

Symptoms are akin to those displayed by the common bitch, only aggravated. Causes vary and can be unfathomable.

The victim of bitchasitis will inevitably cause atrocious pain to those in her surroundings and should thus be promptly removed as the ailment can usually not be alleviated - though some may delude themselves in thinking it can.
This procedure is known as bitchatectomy. It is fairly simple once one has made up their mind to proceed with it. Verbal action should suffice and the use of implements, surgical or others, is not advised.

There exist both acute and chronic forms of bitchasitis.
One should be particularly wary of bitchasitis present in a dormant state, as dealing with a hitherto seemingly healthy specimen whose ailment suddenly breaks out of its dormant state can be a harrowing task.

Mark: -Debbie just hang up on me again after ranting nonstop for fifteen minutes about how I should have called earlier.

John: -Hmm, I'm afraid the signs point to a clear case of bitchasitis.

Mark: -If that's the case I'd better face it, at least I know what to do.

John: - Yup, looks like a bitchatectomy is your only salvation.

Bitchasitis by Uncle Karb September 14, 2010

Bitchinitis

A disease in which someone acts like a bitch for an extended amount of time. This disease is contagious.

I diagnosed my girlfriend with "Bitchinitis" this weekend.

Bitchinitis by Kirkland Water December 12, 2010

Bitchiwitch 

One of the four founders/houses of Snogwarts, a Mary Sue variant of Hogwarts of the Harry Potter fandom. Suethors usually dreate a Bitchiwitch Sue when they've got a chip on their shoulder, because this Oringinal Charachter sure as hell does. A Bitchiwitch Sue is usually in Slytherin, is a misunderstood Goth/Emo, listens to an "enchanted" CD player, bitches at people and has a terrible attitude, yet manages to get every boy at Hogwarts to want to get into her little black bondage pants. Bitchiwitch is one of the most annoying charachters a Suthor can write: Bitchiwitch Sues are mean, hatefull and are generally ass holse who, in a cannon story, would get the crap beaten out of them for being such a jerk. Common Bitchiwitch names are Ravyn, Katrina, Kat, Ashlee/Ashleigh and even, *snort* Belladonna.

Bitchiwitch Sue: Hey, fuck you and your stupid rules, Snape! You can't tell me what to do in your own class room! I'll wear what I want and I'll be pissed if I want because my parents died and I'm Emo and angsty and depressed and sa-
Readers, the class & Snape in unison:
!!!!AVADA KEDAVERA!!!!

Bitchiwitch by Peaseblossom85 July 15, 2006

Bitchinitis

A serious disease that everyone catches now and again. An individual who has contracted Bitchinitis is generally unwilling to perform an action and often times makes excuses about why he/she cannot do something. The list of excuses can go on and on, but at the core, their lack of apathy is what results in nothing getting done. This disease is very contagious, spreading like wildfire to neighboring persons. Some individuals seem to be more susceptible to Bitchinitis than others, with the intensity and duration varying from person to person.

Person A: "Hey man, do you want to go for a run later on?"
Person B: "Nah. I don't really feel like going for a run. It's so hot out and I'm really tired. Plus, all of my clothes are dirty and I think I sprained my arm yesterday. I just know that it's not going to workout."
Person A: "Are you sure about all those things? To me you just sound like you have a case of Bitchinitis."

Bitchinitis by Reap4u March 27, 2015

No Bitchesitis (NBI) 

A mental illness that is best described as either a sudden or consistent wave of loneliness and despair often caused by a lack of female presence in a man’s life - physical and/or online. While this sickness typically applies to males, anyone could test positive for it, and it can often come and go at random, abrupt times of the day or night. Symptoms are immediate drop of mood, drop of emotional energy and even physical energy, and a sudden drop in self-esteem. Treatments include hitting the gym, logging off social media platforms, or actually talking to… some bitches…

“Hey bro! How are you feeling today!”

“Not good man, I’ve caught a pretty rough case of No Bitchesitis (NBI).

No Bitchesitis (NBI) by 🪦💀🪦 August 21, 2022

Terminal Bitchosity 

like terminal velocity, the rate at which a person's bitching gets them bitch slapped.

A Person achieves their Terminal Bitchosity when the downward force of their bitching (Fb) equals the upward force of a fist coming at them (Ff). This causes the net bitching on the object to be zero, resulting in an acceleration of zero.

Did you see that? She called him pencil dick and he smacked her. She finally found terminal bitchosity.

Terminal Bitchosity by OMGR8US September 26, 2009