Loads of young people in the UK use the word "Yay!" and saying like "that image is bad" which means "good photograph",when my daughter said she "got off" with someone and I flipped, she explained it meant "kissed or sucked face", but it had another meaning when I was a teenager in the 60's, Yay has just replaced some words like wow, it may have its origin's elsewhere but it is better know as a positive!
It is also used on a lot of microstock forums when someone gets a payout, "I got a payout, yay! thanks Yay" unless they are saying "I have reached a payout now I can buy some coke", but then "coke" is a soft drink, and then "Charlie" is my grandson that was not named after a drug?
Maybe Yay realise that the world is bigger, and not all buyers will be familiar with local slang.
But it is not as bad as PhotoShelters campaign "Shoot the Day", and how the "face of stock was going to change with STD!"
, now that was not to well thought out!
David