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1.
Originating from the movie "Teeth" based on a vagina with teeth, comes a theory on Genital dental hygene.
This rare disease occurs when the gum lines of the vagina become largely inflamed. Leaving this disease untreated may lead to the need for vaginal floss and vaginewash. If one decides to further neglect vaginal upkeep, one may need a vaginal retainer or even braces.
Most doctors will recommend vaginal toothpaste that comes in two flavors : penis and non-penis.

see Vaginal Orthodontist
Shit, someone better give that bitch some scope, she has mad vagingivitis.

That bitch needs to floss, she may be at definite risk of Vg; Vagingivitis

Nah man, don't go near her, She got some heavy Vagingivitis. Make yo dick fall off
by Fets May 10, 2009
 
2.
Stemming from the psychoanalytical concept of vagina d'entata, this condition occurs when the aforementioned teeth are not properly maintained and gum sensitivity ensues.
Proper use of floss and other hygiene products can prevent the early onset of vagingivitis.
by Amber R. March 09, 2007
 
3.
When a girl sticks a toothbrush in her vagina, the germs left on the brisltes and head of the brush are transfered to the girl and she will forever this disease. Side effects include turning the girl into a pyscho with constant vaginal problems
Girl: i masturbated using a tooth brush last night
Girl 2: O no did u glove up? you'll catch vagingivitis. That shit comes back with you, like herpes
by Sofaking Wetoddid March 16, 2010
 
4.
this occurs when a female has chronic whack ass stankin vagina! Most noticeable when you're going down on that nasty trick and the smell rushes the nostrils almost to the point of projectile vomitting
"Jim ...dude.. this is the second time trying to tounge blast sara and puking on her"

"Bro sha girl sounds like shes got a bad case of vagingivitis, spray that shit with some binaca."
by Aliciasweatypetty December 16, 2008