Origin of yay1
Origin of yay2
Examples from the Web for yay
Yay Haley for quick thinking and Bronagh for quick status updating!
But for The Hangover Part III, basically Todd just emailed me and said I was in it, and I was like, “Yay!”Heather Graham on ‘The Hangover Part III,’ Roles for Women, and More|Marlow Stern|May 24, 2013|DAILY BEAST
If we did this, the policy costs for likely criminals would go up--yay!Should People Be Forced to Buy Liability Insurance for their Guns?|Megan McArdle|December 28, 2012|DAILY BEAST
"Yay; I hear both on ye," said the gentle old mother with a half smile.
At this moment a shout was heard from the alley, "Yay, Penrod!"The Boy Scouts Book of Stories|Various
Then the yay showed him the shortest road to take and bade him return to his people.
“Yay,” sed the Shaker, and he led the way into the house, another Shaker bein sent to put my hosses and waggin under kiver.Why Lincoln Laughed|Russell Herman Conwell
The yay spoke not a word, but pointed down into the valley and led the way thither.
Word Origin for yay
"this," as in yay big "this big," 1950s, perhaps from yea "yes" in its sense of "even, truly, verily." "a sort of demonstrative adverb used with adjectives of size, height, extent, etc., and often accompanied by a hand gesture indicating size" [DAS].