A vagtatt is a tattoo located just above the vagina on the pelvic area of a woman, or directly on the vagina itself. The latter is very rare and especially disturbing. Known to end porno careers instantly, as well as porno actress hotness.
"Oh man did you see that girls butterfly vagtatt? Total boner killer."
"I was going down on a girl, but then I found out she had a vagtatt. WEIRD"
When a vagina is so messed up with stink, sickness, or any other sorts of abnormailities that could equate to either a starring role or a major supporting role in a horror movie.
Basically, there is something seriously wrong with a female's vagina.
Women- how much is that cucumber,
Shop keeper- 70pence love,
Women - great I will take it, its big enough for the vagtable sex I've got planned,
Shop keeper- want another for ur ass, i can do two for a pound.