Your teacher will tell you, 2 year old toddler.
Something you say when you excited or happy.
Yay! Were going bowling!
A unit of measurement used in conjunction with the pinky thumb but to measure girth.
Jesse: Hey Josh how girthy is that 3/4 pinky thumb clutch exhaust frame?
Josh: Arghh, I'd say around yay big Jess.
A word that people use when they don’t mean it
Yay congratulations
You: Yay, I am finally no longer an asshole!