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1. Yay
Used as an exclamation of pleasure, approval, elation, or victory.
I wanna go to Hawaii! Yay! Yay!
by IAMSODOT Mar 11, 2004 add a video
Yay videos
2. Yay
June 7, 2008 Urban Word of the Day
n;
Slang for Cocaine, popular in California's Bay Area.

Syn;
blow,coke,snow.
I'm so strung out from all the yay last night
by Bookworm Feb 2, 2005 add a video
3. yay
the illicit substance also known as cocaine
You can find me in St. Louie,
Where the gun play ring all day.
Some got jobs, and some sell yay.
Others just smoke and fuck all day.
by Nelly Feb 9, 2005 add a video
4. yay
a word used not only to express happieness, but also in conjunction with hand symbols to express size.
-YAY! i won the lottery!

-hes about yay high *hold out hand*

-the box was yay wide by yay high
by berserker395 Jun 29, 2005 add a video
5. yay
Simply, cocaine, from the shortening of the misspelling of the pronunciation of llello], the Spanish word for cocaine.
From "Hopeless" by Ludacris:

Then my eyes turn red,
The sky turns grey,
Children slingin' white in the hood,
We call it "YAY!"
6. yay
Cocaine, Snow, Blow, Sugar Booger, Yayo, White Girl, Coke
You gotta watch them bitches that wanna snort up all your yay.
by Angelo Aug 23, 2003 add a video
7. yay
An exclamation that always needs to be louder. Most often used in conjunction with practicing cheers for a friends national competition.
RD: So now that you know the elements of a good cheer, lets hear one!
FS: *softly* yay
RD: Louder!
FS: *still softly* yay
RD: Louder!
FS: *again, softly* yay
RD: LOUDER!
FS: *Deep breath in, preparing for a loud cheer.* *Softly* yay
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