Yah Yah Day is a holiday that takes place on May 12th each year where you fuck someone with Yah Yah by Eminem playing in the background.
“Bro, look at what day it is today. It’s Yah Yah Day... you know what that means”
When someone is telling you a story and you don't care and wanna sound interested
Wife Honey I went and got my nails painted today.
Husband hell yah
The word Yah Gilly originates from when Ethan Snuck in a fish from petsmart and named it Gilly Nelson and Mckinley said Yah Gilly.
Yah gilly means anything that fits good vibes or good job
I made a 100 on my chemistry final. YAH GILLY
An excited expression for being in the zone of a hyped moment
I found a bag of uncut diamonds on the moon beneath Emma Stone.
Yah yer!