YAY! 

1. An expression of joy usually accompanied by raising both arms in the air; the higher, the more joyful.
Can also be used sarcastically.

Chocolate and sex? YAY!

YAY! by Elaine October 17, 2001

YAY! 

Used as a conversation place hoder. ie when you cant think of anything else to say. (usually with little or no emotion - to confirm that you were listening)

Person1: ...and so thats how i came to have a ferret up my clacker.
Person2: yay.

YAY! by louis October 17, 2001

Yay

Yes

Yay. It is so cool.

Yay by Bonehead5000 June 4, 2020

Yay

Used as an exclamation of pleasure, approval, elation, or victory.

I wanna go to Hawaii! Yay! Yay!

Yay by IAMSODOT March 11, 2004

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

yay by serialman August 31, 2012

YAY!!!! 

1. Extreme happiness.
2. Can be used in response to :) .
3. The suffix -vm can be used for humour purposes.
4. Discovered and utilized most frequently by a gentleman named Shaun.

Shaun: YAY!!!!

YAY!!!! by megaaaaaaa April 3, 2009