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1.
IVS
IVS stands for itchy vagina syndrome. Some days your just itchy down there, it could be a disease or because you just haven't shaved in a few days but whatever the reason you just can't stop touching your vagina.
Emily, stop touching your vagina, do you have crabs?

No, I just have IVS!
by EJM July 01, 2007
 
2.
IVS
Intertwined Vagina Sydrome- When a boyfriend and girlfriend spend so much time together that the guy grows a vagina and they become unseperable.
Good lord those two are connected at the hip. Nope they've just got IVS
by horsenutsmez February 28, 2012
 
3.
IVS
"IVS" is an acronym that stands for Indestructible Vagina Syndrome. This is the name given to a woman that can be kicked in the crotch and be unharmed.
*HYAH!*
"Ha! I just kicked your vagina!"

"I have IVS, therefore, I am unhurt."

"Oh, shi-"
by Mistress 9 November 16, 2008
 
4.
IVS
Acronymn for Irritable Vowel Syndrome. The excessive use of vowels when expressing amazement, anguish, fear, surprise etc.
Suffered mostly by latin language speakers, symptoms include extended uterrences along the lines of "Ay yi yi yaaaai", "Gooooooooooaaaaalll", "Aieeeeeee" etc. In the animal kingdom this affliction is most suffered by cows and is manfisted mostly by extended "moooooos".
The Argentinian football commentator football commentator met the relevant IVS requirements in order to qualify for his vocation
by General Scallywag October 10, 2014