(interj.) said when expressing happiness!

When someone goes to the gym and spends 90% of the time on their phones scrolling through social media

When yay just wont cut it

The level of yay in a person, place or situation.

when something really really good has happened, instead of saying yay, you say Yayness

showing expressions of great happyness followed by a long list of exclamation marks. usually yelled by some freak who is over excited about something...i.e. what i do, a lot!!!!

Its an expression of joy