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water based lubricant used to fuck through the butt.
It has a thick consistency and a tendency to dry out during use, but can be "reactivated" by the addition of saliva or more water. Not recommended for ingestion, it has a sweetish taste, so as to not interfere with oral sex.
Woman: never through the butt. that hurts! the ass is not lubricated!
Man: Oh, common baby! I'll use some K Y to make it easier!
K Y by SuperJugss August 23, 2007
Related Words

K-Y Jelly 

K-Y Jelly is a water-based, water-soluble personal lubricant produced by Johnson & Johnson. The initials "K-Y" are not known to represent any words — they were described by their originator as "arbitrary letters" — but are retained for their brand-identity. K-Y Jelly uses glycerin and hydroxyethyl cellulose as the lubricant. K-Y Jelly does not contain a spermicide.
My girlfriend has to quit having sex after about 15 minutes because her vagina starts to dry up, and it hurts her. So I used some K-Y Jelly to add moisture.
K-Y Jelly by MsCtrl January 24, 2009

K-Y Jelly 

The stuff you use to make sure the donkey doesn't get hurt while you're pumping it.
"Try to go easy on the ass and use K-Y Jelly."
K-Y Jelly by Mednub May 28, 2006

K.Y.H.O.M.P.B.

An abbreviation for keep your hand outta my pocket bitch!
Your at the mall and your girl wants to buy something expensive:
"Hey hoe, K.Y.H.O.M.P.B.! got it!"
K.Y.H.O.M.P.B. by Cody reppin 520 September 9, 2007

k y b i l 

(keep yo bitch in line) what you say to someone when their bitch gets out of line
man1:sorry my girl shoudnt have said that

man2: yo dude k y b i l
k y b i l by lil saint omg July 15, 2010

k y jelly fart 

A fart usually made by a butt pirate. Its an untraditional smell made up of latex and baby oil.
Hey Billy, I think that Richard Simmons groupie just blew a K Y jelly fart.