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(mouth-I-tis) A common phenomenon when one can't control the impulsive desire to shoot off one's mouth. Friends nor family is safe from the person suffering from mouthitis for they will spill secrets, twist words and just plain make up stuff for their own twisted fun.

One must always remember not to confide in a mouthitis sufferer. Only do so if the information shared with a mouthitis sufferer is something you want to become widely known as sharing with them basically guarantees it.

Mouthitis sufferers are also in essence "back stabbers" and do not make good friends.
Man, that chick has a serious case of mouthitis.

That was personal and I told you that in confidence. If I'd known you have mouthitis I would never have told you. Thanks, some friend you are.

Obviously you didn't know she has mouthitis, she told everyone dude !!!
Mouthitis by Mizz Ella Ella Bella September 26, 2011
Related Words

Moanitis 

Moan here moan there this disease makes you moan everywhere
Stop moaning bro! Do you have moanitis??
Moanitis by Sophie.Rose March 5, 2020

Mounties 

Canada's police force. Sadly, better than that of America.
I avoided the Mounties by hiding in some bushes.
Mounties by Skinny Skin May 25, 2004
A Cypriot influencer based in Leeds, UK.
Fan#1: Hey! Do you know Motitis?

Fan#2: omg duh who doesn't?

Fan#1: I always liked you...

Fan#2: What? why didn't you tell me?

Fan#1: ...

Fan#2: bye James
Motitis by Motitis May 20, 2019
Newly discovered disease where tumors start to grow in your brain and then spread throughout your body. Symptoms include rashing of the genital areas, sharp rectum pains, extreme head aches that last for days on end, troubled breathing, painful urination, extreme bowel movements, and constaint body odor. No cure is known. Puerto Rican's brought the disease over into the United States while smuggling drugs. Most prominent in the Northeastern area of Illinois due to the growing population of Puerto Ricans and drug use in that area.
" I have these symptoms"

"You have Monitis"
Monititis, commonly known as “computer poisoning,” occurs when a patient is subjugated, either through occupational obligation, or—shockingly and more commonly—through his own free will, to endless hours of staring directly at a monitor, including those of computers, televisions, smartphones, and similar devices. Common symptoms of this rapidly spreading virus include headache, nausea, vomiting, brain damage, obesity, and frying of the retina, with more severe symptoms including vision loss, heart failure, depression, employment loss, loss of friendship, loss of a social life in general, and an overall rapid decay in moral character.

More troubling, however, are recent studies concluding decisively that patients spending more than 4 hours/day in front of the computer are likely to experience an inexplicable yet overwhelming need to devote the rest of their day to similar activities, rendered hopelessly impotent in preventing further damage.

Monititis, either mild or severe, has been found in a staggering 86% of adults aged 18-50 tested in the United States, with infection rates disproportionately higher in males aged 18-24. Scientific studies have also, disturbingly, shown that 95% of infected patients are wholly unaware of their ailment. In rare cases, a patient may consciously discover the cause of discomfort; however, most of these patients will quickly, suddenly, and irreversibly forget their ascertainment, again rendering them helpless in taking reparative action.
Sick Guy: Owww…….fuck!

Healthy Guy: What’s wrong, dude?

Sick Guy: Monititis, man. I can’t fucking see straight anymore.

Healthy Guy: What the hell is monititis?

---five-second pause---

Sick Guy (angry and confused): What?!? What are you talking about?

Healthy Guy: Dude, you just said like five seconds ago that you were suffering from moni—

Sick Guy: Please, if you would EXCUSE me, somebody just added me on Facebook!
monititis by monititis_poster November 17, 2010